209522020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{117709}}^1$

素因数の和:117807

約数の個数: 24

約数和(自身を含む): 444943800

約数和(自身を除く): 235421780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 117709, 235418, 470836, 588545, 1177090, 2354180, 10476101, 20952202, 41904404, 52380505, 104761010, 209522020]

約数ペア:

[(1, 209522020), (2, 104761010), (4, 52380505), (5, 41904404), (10, 20952202), (20, 10476101), (89, 2354180), (178, 1177090), (356, 588545), (445, 470836), (890, 235418), (1780, 117709)]