20980813

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{1373}}^1$

素因数の和:1476

約数の個数: 16

約数和(自身を含む): 25061760

約数和(自身を除く): 4080947

約数列:

[1, 7, 37, 59, 259, 413, 1373, 2183, 9611, 15281, 50801, 81007, 355607, 567049, 2997259, 20980813]

約数ペア:

[(1, 20980813), (7, 2997259), (37, 567049), (59, 355607), (259, 81007), (413, 50801), (1373, 15281), (2183, 9611)]