656760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 2126880

約数和(自身を除く): 1470120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 421, 520, 780, 842, 1263, 1560, 1684, 2105, 2526, 3368, 4210, 5052, 5473, 6315, 8420, 10104, 10946, 12630, 16419, 16840, 21892, 25260, 27365, 32838, 43784, 50520, 54730, 65676, 82095, 109460, 131352, 164190, 218920, 328380, 656760]

約数ペア:

[(1, 656760), (2, 328380), (3, 218920), (4, 164190), (5, 131352), (6, 109460), (8, 82095), (10, 65676), (12, 54730), (13, 50520), (15, 43784), (20, 32838), (24, 27365), (26, 25260), (30, 21892), (39, 16840), (40, 16419), (52, 12630), (60, 10946), (65, 10104), (78, 8420), (104, 6315), (120, 5473), (130, 5052), (156, 4210), (195, 3368), (260, 2526), (312, 2105), (390, 1684), (421, 1560), (520, 1263), (780, 842)]