81242020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{51419}}^1$

素因数の和:51507

約数の個数: 24

約数和(自身を含む): 172771200

約数和(自身を除く): 91529180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 51419, 102838, 205676, 257095, 514190, 1028380, 4062101, 8124202, 16248404, 20310505, 40621010, 81242020]

約数ペア:

[(1, 81242020), (2, 40621010), (4, 20310505), (5, 16248404), (10, 8124202), (20, 4062101), (79, 1028380), (158, 514190), (316, 257095), (395, 205676), (790, 102838), (1580, 51419)]