20979290

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51169}}^1$

素因数の和:51217

約数の個数: 16

約数和(自身を含む): 38684520

約数和(自身を除く): 17705230

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51169, 102338, 255845, 511690, 2097929, 4195858, 10489645, 20979290]

約数ペア:

[(1, 20979290), (2, 10489645), (5, 4195858), (10, 2097929), (41, 511690), (82, 255845), (205, 102338), (410, 51169)]