20975760

素因数分解:

$2^4\times 3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1$

素因数の和:124

約数の個数: 240

約数和(自身を含む): 79619904

約数和(自身を除く): 58644144

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 81, 83, 90, 104, 108, 117, 120, 130, 135, 144, 156, 162, 166, 180, 195, 208, 216, 234, 240, 243, 249, 260, 270, 312, 324, 332, 351, 360, 390, 405, 415, 432, 468, 486, 498, 520, 540, 585, 624, 648, 664, 702, 720, 747, 780, 810, 830, 936, 972, 996, 1040, 1053, 1079, 1080, 1170, 1215, 1245, 1296, 1328, 1404, 1494, 1560, 1620, 1660, 1755, 1872, 1944, 1992, 2106, 2158, 2160, 2241, 2340, 2430, 2490, 2808, 2988, 3120, 3159, 3237, 3240, 3320, 3510, 3735, 3888, 3984, 4212, 4316, 4482, 4680, 4860, 4980, 5265, 5395, 5616, 5976, 6318, 6474, 6480, 6640, 6723, 7020, 7470, 8424, 8632, 8964, 9360, 9711, 9720, 9960, 10530, 10790, 11205, 11952, 12636, 12948, 13446, 14040, 14940, 15795, 16185, 16848, 17264, 17928, 19422, 19440, 19920, 20169, 21060, 21580, 22410, 25272, 25896, 26892, 28080, 29133, 29880, 31590, 32370, 33615, 35856, 38844, 40338, 42120, 43160, 44820, 48555, 50544, 51792, 53784, 58266, 59760, 63180, 64740, 67230, 77688, 80676, 84240, 86320, 87399, 89640, 97110, 100845, 107568, 116532, 126360, 129480, 134460, 145665, 155376, 161352, 174798, 179280, 194220, 201690, 233064, 252720, 258960, 262197, 268920, 291330, 322704, 349596, 388440, 403380, 436995, 466128, 524394, 537840, 582660, 699192, 776880, 806760, 873990, 1048788, 1165320, 1310985, 1398384, 1613520, 1747980, 2097576, 2330640, 2621970, 3495960, 4195152, 5243940, 6991920, 10487880, 20975760]

約数ペア:

[(1, 20975760), (2, 10487880), (3, 6991920), (4, 5243940), (5, 4195152), (6, 3495960), (8, 2621970), (9, 2330640), (10, 2097576), (12, 1747980), (13, 1613520), (15, 1398384), (16, 1310985), (18, 1165320), (20, 1048788), (24, 873990), (26, 806760), (27, 776880), (30, 699192), (36, 582660), (39, 537840), (40, 524394), (45, 466128), (48, 436995), (52, 403380), (54, 388440), (60, 349596), (65, 322704), (72, 291330), (78, 268920), (80, 262197), (81, 258960), (83, 252720), (90, 233064), (104, 201690), (108, 194220), (117, 179280), (120, 174798), (130, 161352), (135, 155376), (144, 145665), (156, 134460), (162, 129480), (166, 126360), (180, 116532), (195, 107568), (208, 100845), (216, 97110), (234, 89640), (240, 87399), (243, 86320), (249, 84240), (260, 80676), (270, 77688), (312, 67230), (324, 64740), (332, 63180), (351, 59760), (360, 58266), (390, 53784), (405, 51792), (415, 50544), (432, 48555), (468, 44820), (486, 43160), (498, 42120), (520, 40338), (540, 38844), (585, 35856), (624, 33615), (648, 32370), (664, 31590), (702, 29880), (720, 29133), (747, 28080), (780, 26892), (810, 25896), (830, 25272), (936, 22410), (972, 21580), (996, 21060), (1040, 20169), (1053, 19920), (1079, 19440), (1080, 19422), (1170, 17928), (1215, 17264), (1245, 16848), (1296, 16185), (1328, 15795), (1404, 14940), (1494, 14040), (1560, 13446), (1620, 12948), (1660, 12636), (1755, 11952), (1872, 11205), (1944, 10790), (1992, 10530), (2106, 9960), (2158, 9720), (2160, 9711), (2241, 9360), (2340, 8964), (2430, 8632), (2490, 8424), (2808, 7470), (2988, 7020), (3120, 6723), (3159, 6640), (3237, 6480), (3240, 6474), (3320, 6318), (3510, 5976), (3735, 5616), (3888, 5395), (3984, 5265), (4212, 4980), (4316, 4860), (4482, 4680)]