20120395

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1\times {\mathrm{479}}^1$

素因数の和:786

約数の個数: 16

約数和(自身を含む): 25067520

約数和(自身を除く): 4947125

約数列:

[1, 5, 31, 155, 271, 479, 1355, 2395, 8401, 14849, 42005, 74245, 129809, 649045, 4024079, 20120395]

約数ペア:

[(1, 20120395), (5, 4024079), (31, 649045), (155, 129809), (271, 74245), (479, 42005), (1355, 14849), (2395, 8401)]