68207020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{881}}^1$

素因数の和:983

約数の個数: 72

約数和(自身を含む): 168920640

約数和(自身を除く): 100713620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 79, 98, 140, 158, 196, 245, 316, 395, 490, 553, 790, 881, 980, 1106, 1580, 1762, 2212, 2765, 3524, 3871, 4405, 5530, 6167, 7742, 8810, 11060, 12334, 15484, 17620, 19355, 24668, 30835, 38710, 43169, 61670, 69599, 77420, 86338, 123340, 139198, 172676, 215845, 278396, 347995, 431690, 487193, 695990, 863380, 974386, 1391980, 1948772, 2435965, 3410351, 4871930, 6820702, 9743860, 13641404, 17051755, 34103510, 68207020]

約数ペア:

[(1, 68207020), (2, 34103510), (4, 17051755), (5, 13641404), (7, 9743860), (10, 6820702), (14, 4871930), (20, 3410351), (28, 2435965), (35, 1948772), (49, 1391980), (70, 974386), (79, 863380), (98, 695990), (140, 487193), (158, 431690), (196, 347995), (245, 278396), (316, 215845), (395, 172676), (490, 139198), (553, 123340), (790, 86338), (881, 77420), (980, 69599), (1106, 61670), (1580, 43169), (1762, 38710), (2212, 30835), (2765, 24668), (3524, 19355), (3871, 17620), (4405, 15484), (5530, 12334), (6167, 11060), (7742, 8810)]