21406255

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{17333}}^1$

素因数の和:17370

約数の個数: 16

約数和(自身を含む): 29121120

約数和(自身を除く): 7714865

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 17333, 86665, 225329, 329327, 1126645, 1646635, 4281251, 21406255]

約数ペア:

[(1, 21406255), (5, 4281251), (13, 1646635), (19, 1126645), (65, 329327), (95, 225329), (247, 86665), (1235, 17333)]