19786280

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6967}}^1$

素因数の和:7049

約数の個数: 32

約数和(自身を含む): 45152640

約数和(自身を除く): 25366360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6967, 13934, 27868, 34835, 55736, 69670, 139340, 278680, 494657, 989314, 1978628, 2473285, 3957256, 4946570, 9893140, 19786280]

約数ペア:

[(1, 19786280), (2, 9893140), (4, 4946570), (5, 3957256), (8, 2473285), (10, 1978628), (20, 989314), (40, 494657), (71, 278680), (142, 139340), (284, 69670), (355, 55736), (568, 34835), (710, 27868), (1420, 13934), (2840, 6967)]