20959640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2371}}^1$

素因数の和:2412

約数の個数: 64

約数和(自身を含む): 53796960

約数和(自身を除く): 32837320

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2371, 4420, 4742, 8840, 9484, 11855, 18968, 23710, 30823, 40307, 47420, 61646, 80614, 94840, 123292, 154115, 161228, 201535, 246584, 308230, 322456, 403070, 523991, 616460, 806140, 1047982, 1232920, 1612280, 2095964, 2619955, 4191928, 5239910, 10479820, 20959640]

約数ペア:

[(1, 20959640), (2, 10479820), (4, 5239910), (5, 4191928), (8, 2619955), (10, 2095964), (13, 1612280), (17, 1232920), (20, 1047982), (26, 806140), (34, 616460), (40, 523991), (52, 403070), (65, 322456), (68, 308230), (85, 246584), (104, 201535), (130, 161228), (136, 154115), (170, 123292), (221, 94840), (260, 80614), (340, 61646), (442, 47420), (520, 40307), (680, 30823), (884, 23710), (1105, 18968), (1768, 11855), (2210, 9484), (2371, 8840), (4420, 4742)]