16904420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{823}}^1$

素因数の和:924

約数の個数: 48

約数和(自身を含む): 38760960

約数和(自身を除く): 21856540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 823, 1027, 1580, 1646, 2054, 3292, 4108, 4115, 5135, 8230, 10270, 10699, 16460, 20540, 21398, 42796, 53495, 65017, 106990, 130034, 213980, 260068, 325085, 650170, 845221, 1300340, 1690442, 3380884, 4226105, 8452210, 16904420]

約数ペア:

[(1, 16904420), (2, 8452210), (4, 4226105), (5, 3380884), (10, 1690442), (13, 1300340), (20, 845221), (26, 650170), (52, 325085), (65, 260068), (79, 213980), (130, 130034), (158, 106990), (260, 65017), (316, 53495), (395, 42796), (790, 21398), (823, 20540), (1027, 16460), (1580, 10699), (1646, 10270), (2054, 8230), (3292, 5135), (4108, 4115)]