21719995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12739}}^1$

素因数の和:12786

約数の個数: 16

約数和(自身を含む): 29352960

約数和(自身を除く): 7632965

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12739, 63695, 140129, 394909, 700645, 1974545, 4343999, 21719995]

約数ペア:

[(1, 21719995), (5, 4343999), (11, 1974545), (31, 700645), (55, 394909), (155, 140129), (341, 63695), (1705, 12739)]