81788680

素因数分解:

$2^3\times 5^1\times {\mathrm{179}}^1\times {\mathrm{11423}}^1$

素因数の和:11613

約数の個数: 32

約数和(自身を含む): 185068800

約数和(自身を除く): 103280120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 179, 358, 716, 895, 1432, 1790, 3580, 7160, 11423, 22846, 45692, 57115, 91384, 114230, 228460, 456920, 2044717, 4089434, 8178868, 10223585, 16357736, 20447170, 40894340, 81788680]

約数ペア:

[(1, 81788680), (2, 40894340), (4, 20447170), (5, 16357736), (8, 10223585), (10, 8178868), (20, 4089434), (40, 2044717), (179, 456920), (358, 228460), (716, 114230), (895, 91384), (1432, 57115), (1790, 45692), (3580, 22846), (7160, 11423)]