20597885

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7643}}^1$

素因数の和:7673

約数の個数: 24

約数和(自身を含む): 31370976

約数和(自身を除く): 10773091

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7643, 38215, 53501, 84073, 267505, 374507, 420365, 588511, 1872535, 2942555, 4119577, 20597885]

約数ペア:

[(1, 20597885), (5, 4119577), (7, 2942555), (11, 1872535), (35, 588511), (49, 420365), (55, 374507), (77, 267505), (245, 84073), (385, 53501), (539, 38215), (2695, 7643)]