20961720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1493}}^1$

素因数の和:1526

約数の個数: 128

約数和(自身を含む): 75297600

約数和(自身を除く): 54335880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 52, 54, 60, 65, 72, 78, 90, 104, 108, 117, 120, 130, 135, 156, 180, 195, 216, 234, 260, 270, 312, 351, 360, 390, 468, 520, 540, 585, 702, 780, 936, 1080, 1170, 1404, 1493, 1560, 1755, 2340, 2808, 2986, 3510, 4479, 4680, 5972, 7020, 7465, 8958, 11944, 13437, 14040, 14930, 17916, 19409, 22395, 26874, 29860, 35832, 38818, 40311, 44790, 53748, 58227, 59720, 67185, 77636, 80622, 89580, 97045, 107496, 116454, 134370, 155272, 161244, 174681, 179160, 194090, 201555, 232908, 268740, 291135, 322488, 349362, 388180, 403110, 465816, 524043, 537480, 582270, 698724, 776360, 806220, 873405, 1048086, 1164540, 1397448, 1612440, 1746810, 2096172, 2329080, 2620215, 3493620, 4192344, 5240430, 6987240, 10480860, 20961720]

約数ペア:

[(1, 20961720), (2, 10480860), (3, 6987240), (4, 5240430), (5, 4192344), (6, 3493620), (8, 2620215), (9, 2329080), (10, 2096172), (12, 1746810), (13, 1612440), (15, 1397448), (18, 1164540), (20, 1048086), (24, 873405), (26, 806220), (27, 776360), (30, 698724), (36, 582270), (39, 537480), (40, 524043), (45, 465816), (52, 403110), (54, 388180), (60, 349362), (65, 322488), (72, 291135), (78, 268740), (90, 232908), (104, 201555), (108, 194090), (117, 179160), (120, 174681), (130, 161244), (135, 155272), (156, 134370), (180, 116454), (195, 107496), (216, 97045), (234, 89580), (260, 80622), (270, 77636), (312, 67185), (351, 59720), (360, 58227), (390, 53748), (468, 44790), (520, 40311), (540, 38818), (585, 35832), (702, 29860), (780, 26874), (936, 22395), (1080, 19409), (1170, 17916), (1404, 14930), (1493, 14040), (1560, 13437), (1755, 11944), (2340, 8958), (2808, 7465), (2986, 7020), (3510, 5972), (4479, 4680)]