21419665

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1\times {\mathrm{257}}^1$

素因数の和:552

約数の個数: 16

約数和(自身を含む): 26254080

約数和(自身を除く): 4834415

約数列:

[1, 5, 79, 211, 257, 395, 1055, 1285, 16669, 20303, 54227, 83345, 101515, 271135, 4283933, 21419665]

約数ペア:

[(1, 21419665), (5, 4283933), (79, 271135), (211, 101515), (257, 83345), (395, 54227), (1055, 20303), (1285, 16669)]