21145917

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28537}}^1$

素因数の和:28572

約数の個数: 16

約数和(自身を含む): 31962560

約数和(自身を除く): 10816643

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28537, 85611, 370981, 542203, 1112943, 1626609, 7048639, 21145917]

約数ペア:

[(1, 21145917), (3, 7048639), (13, 1626609), (19, 1112943), (39, 542203), (57, 370981), (247, 85611), (741, 28537)]