18557980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1867}}^1$

素因数の和:1954

約数の個数: 48

約数和(自身を含む): 45190656

約数和(自身を除く): 26632676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1867, 1988, 2485, 3734, 4970, 7468, 9335, 9940, 13069, 18670, 26138, 37340, 52276, 65345, 130690, 132557, 261380, 265114, 530228, 662785, 927899, 1325570, 1855798, 2651140, 3711596, 4639495, 9278990, 18557980]

約数ペア:

[(1, 18557980), (2, 9278990), (4, 4639495), (5, 3711596), (7, 2651140), (10, 1855798), (14, 1325570), (20, 927899), (28, 662785), (35, 530228), (70, 265114), (71, 261380), (140, 132557), (142, 130690), (284, 65345), (355, 52276), (497, 37340), (710, 26138), (994, 18670), (1420, 13069), (1867, 9940), (1988, 9335), (2485, 7468), (3734, 4970)]