81810820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{569}}^1$

素因数の和:677

約数の個数: 96

約数和(自身を含む): 214502400

約数和(自身を除く): 132691580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 79, 91, 130, 140, 158, 182, 260, 316, 364, 395, 455, 553, 569, 790, 910, 1027, 1106, 1138, 1580, 1820, 2054, 2212, 2276, 2765, 2845, 3983, 4108, 5135, 5530, 5690, 7189, 7397, 7966, 10270, 11060, 11380, 14378, 14794, 15932, 19915, 20540, 28756, 29588, 35945, 36985, 39830, 44951, 51779, 71890, 73970, 79660, 89902, 103558, 143780, 147940, 179804, 207116, 224755, 258895, 314657, 449510, 517790, 584363, 629314, 899020, 1035580, 1168726, 1258628, 1573285, 2337452, 2921815, 3146570, 4090541, 5843630, 6293140, 8181082, 11687260, 16362164, 20452705, 40905410, 81810820]

約数ペア:

[(1, 81810820), (2, 40905410), (4, 20452705), (5, 16362164), (7, 11687260), (10, 8181082), (13, 6293140), (14, 5843630), (20, 4090541), (26, 3146570), (28, 2921815), (35, 2337452), (52, 1573285), (65, 1258628), (70, 1168726), (79, 1035580), (91, 899020), (130, 629314), (140, 584363), (158, 517790), (182, 449510), (260, 314657), (316, 258895), (364, 224755), (395, 207116), (455, 179804), (553, 147940), (569, 143780), (790, 103558), (910, 89902), (1027, 79660), (1106, 73970), (1138, 71890), (1580, 51779), (1820, 44951), (2054, 39830), (2212, 36985), (2276, 35945), (2765, 29588), (2845, 28756), (3983, 20540), (4108, 19915), (5135, 15932), (5530, 14794), (5690, 14378), (7189, 11380), (7397, 11060), (7966, 10270)]