21648385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12697}}^1$

素因数の和:12744

約数の個数: 16

約数和(自身を含む): 29256192

約数和(自身を除く): 7607807

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12697, 63485, 139667, 393607, 698335, 1968035, 4329677, 21648385]

約数ペア:

[(1, 21648385), (5, 4329677), (11, 1968035), (31, 698335), (55, 393607), (155, 139667), (341, 63485), (1705, 12697)]