31319900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{7639}}^1$

素因数の和:7694

約数の個数: 36

約数和(自身を含む): 69630960

約数和(自身を除く): 38311060

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 7639, 15278, 30556, 38195, 76390, 152780, 190975, 313199, 381950, 626398, 763900, 1252796, 1565995, 3131990, 6263980, 7829975, 15659950, 31319900]

約数ペア:

[(1, 31319900), (2, 15659950), (4, 7829975), (5, 6263980), (10, 3131990), (20, 1565995), (25, 1252796), (41, 763900), (50, 626398), (82, 381950), (100, 313199), (164, 190975), (205, 152780), (410, 76390), (820, 38195), (1025, 30556), (2050, 15278), (4100, 7639)]