20128780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2357}}^1$

素因数の和:2434

約数の個数: 48

約数和(自身を含む): 49121856

約数和(自身を除く): 28993076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2357, 4270, 4714, 8540, 9428, 11785, 16499, 23570, 32998, 47140, 65996, 82495, 143777, 164990, 287554, 329980, 575108, 718885, 1006439, 1437770, 2012878, 2875540, 4025756, 5032195, 10064390, 20128780]

約数ペア:

[(1, 20128780), (2, 10064390), (4, 5032195), (5, 4025756), (7, 2875540), (10, 2012878), (14, 1437770), (20, 1006439), (28, 718885), (35, 575108), (61, 329980), (70, 287554), (122, 164990), (140, 143777), (244, 82495), (305, 65996), (427, 47140), (610, 32998), (854, 23570), (1220, 16499), (1708, 11785), (2135, 9428), (2357, 8540), (4270, 4714)]