21169980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 144

約数和(自身を含む): 70630560

約数和(自身を除く): 49460580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 83, 90, 109, 117, 130, 156, 166, 180, 195, 218, 234, 249, 260, 327, 332, 390, 415, 436, 468, 498, 545, 585, 654, 747, 780, 830, 981, 996, 1079, 1090, 1170, 1245, 1308, 1417, 1494, 1635, 1660, 1962, 2158, 2180, 2340, 2490, 2834, 2988, 3237, 3270, 3735, 3924, 4251, 4316, 4905, 4980, 5395, 5668, 6474, 6540, 7085, 7470, 8502, 9047, 9711, 9810, 10790, 12753, 12948, 14170, 14940, 16185, 17004, 18094, 19422, 19620, 21255, 21580, 25506, 27141, 28340, 32370, 36188, 38844, 42510, 45235, 48555, 51012, 54282, 63765, 64740, 81423, 85020, 90470, 97110, 108564, 117611, 127530, 135705, 162846, 180940, 194220, 235222, 255060, 271410, 325692, 352833, 407115, 470444, 542820, 588055, 705666, 814230, 1058499, 1176110, 1411332, 1628460, 1764165, 2116998, 2352220, 3528330, 4233996, 5292495, 7056660, 10584990, 21169980]

約数ペア:

[(1, 21169980), (2, 10584990), (3, 7056660), (4, 5292495), (5, 4233996), (6, 3528330), (9, 2352220), (10, 2116998), (12, 1764165), (13, 1628460), (15, 1411332), (18, 1176110), (20, 1058499), (26, 814230), (30, 705666), (36, 588055), (39, 542820), (45, 470444), (52, 407115), (60, 352833), (65, 325692), (78, 271410), (83, 255060), (90, 235222), (109, 194220), (117, 180940), (130, 162846), (156, 135705), (166, 127530), (180, 117611), (195, 108564), (218, 97110), (234, 90470), (249, 85020), (260, 81423), (327, 64740), (332, 63765), (390, 54282), (415, 51012), (436, 48555), (468, 45235), (498, 42510), (545, 38844), (585, 36188), (654, 32370), (747, 28340), (780, 27141), (830, 25506), (981, 21580), (996, 21255), (1079, 19620), (1090, 19422), (1170, 18094), (1245, 17004), (1308, 16185), (1417, 14940), (1494, 14170), (1635, 12948), (1660, 12753), (1962, 10790), (2158, 9810), (2180, 9711), (2340, 9047), (2490, 8502), (2834, 7470), (2988, 7085), (3237, 6540), (3270, 6474), (3735, 5668), (3924, 5395), (4251, 4980), (4316, 4905)]