81331760

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11423}}^1$

素因数の和:11525

約数の個数: 40

約数和(自身を含む): 191237760

約数和(自身を除く): 109906000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 11423, 22846, 45692, 57115, 91384, 114230, 182768, 228460, 456920, 913840, 1016647, 2033294, 4066588, 5083235, 8133176, 10166470, 16266352, 20332940, 40665880, 81331760]

約数ペア:

[(1, 81331760), (2, 40665880), (4, 20332940), (5, 16266352), (8, 10166470), (10, 8133176), (16, 5083235), (20, 4066588), (40, 2033294), (80, 1016647), (89, 913840), (178, 456920), (356, 228460), (445, 182768), (712, 114230), (890, 91384), (1424, 57115), (1780, 45692), (3560, 22846), (7120, 11423)]