20297680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{673}}^1$

素因数の和:728

約数の個数: 80

約数和(自身を含む): 52652880

約数和(自身を除く): 32355200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 80, 104, 116, 130, 145, 208, 232, 260, 290, 377, 464, 520, 580, 673, 754, 1040, 1160, 1346, 1508, 1885, 2320, 2692, 3016, 3365, 3770, 5384, 6032, 6730, 7540, 8749, 10768, 13460, 15080, 17498, 19517, 26920, 30160, 34996, 39034, 43745, 53840, 69992, 78068, 87490, 97585, 139984, 156136, 174980, 195170, 253721, 312272, 349960, 390340, 507442, 699920, 780680, 1014884, 1268605, 1561360, 2029768, 2537210, 4059536, 5074420, 10148840, 20297680]

約数ペア:

[(1, 20297680), (2, 10148840), (4, 5074420), (5, 4059536), (8, 2537210), (10, 2029768), (13, 1561360), (16, 1268605), (20, 1014884), (26, 780680), (29, 699920), (40, 507442), (52, 390340), (58, 349960), (65, 312272), (80, 253721), (104, 195170), (116, 174980), (130, 156136), (145, 139984), (208, 97585), (232, 87490), (260, 78068), (290, 69992), (377, 53840), (464, 43745), (520, 39034), (580, 34996), (673, 30160), (754, 26920), (1040, 19517), (1160, 17498), (1346, 15080), (1508, 13460), (1885, 10768), (2320, 8749), (2692, 7540), (3016, 6730), (3365, 6032), (3770, 5384)]