80981680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77867}}^1$

素因数の和:77893

約数の個数: 40

約数和(自身を含む): 202768272

約数和(自身を除く): 121786592

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 77867, 155734, 311468, 389335, 622936, 778670, 1012271, 1245872, 1557340, 2024542, 3114680, 4049084, 5061355, 6229360, 8098168, 10122710, 16196336, 20245420, 40490840, 80981680]

約数ペア:

[(1, 80981680), (2, 40490840), (4, 20245420), (5, 16196336), (8, 10122710), (10, 8098168), (13, 6229360), (16, 5061355), (20, 4049084), (26, 3114680), (40, 2024542), (52, 1557340), (65, 1245872), (80, 1012271), (104, 778670), (130, 622936), (208, 389335), (260, 311468), (520, 155734), (1040, 77867)]