21978111

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:938

約数の個数: 16

約数和(自身を含む): 30232800

約数和(自身を除く): 8254689

約数列:

[1, 3, 37, 111, 389, 509, 1167, 1527, 14393, 18833, 43179, 56499, 198001, 594003, 7326037, 21978111]

約数ペア:

[(1, 21978111), (3, 7326037), (37, 594003), (111, 198001), (389, 56499), (509, 43179), (1167, 18833), (1527, 14393)]