72320440

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{3457}}^1$

素因数の和:3991

約数の個数: 32

約数和(自身を含む): 163079280

約数和(自身を除く): 90758840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 3457, 4184, 5230, 6914, 10460, 13828, 17285, 20920, 27656, 34570, 69140, 138280, 1808011, 3616022, 7232044, 9040055, 14464088, 18080110, 36160220, 72320440]

約数ペア:

[(1, 72320440), (2, 36160220), (4, 18080110), (5, 14464088), (8, 9040055), (10, 7232044), (20, 3616022), (40, 1808011), (523, 138280), (1046, 69140), (2092, 34570), (2615, 27656), (3457, 20920), (4184, 17285), (5230, 13828), (6914, 10460)]