81277640

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{15511}}^1$

素因数の和:15653

約数の個数: 32

約数和(自身を含む): 184282560

約数和(自身を除く): 103004920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 15511, 31022, 62044, 77555, 124088, 155110, 310220, 620440, 2031941, 4063882, 8127764, 10159705, 16255528, 20319410, 40638820, 81277640]

約数ペア:

[(1, 81277640), (2, 40638820), (4, 20319410), (5, 16255528), (8, 10159705), (10, 8127764), (20, 4063882), (40, 2031941), (131, 620440), (262, 310220), (524, 155110), (655, 124088), (1048, 77555), (1310, 62044), (2620, 31022), (5240, 15511)]