21987928

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{88661}}^1$

素因数の和:88698

約数の個数: 16

約数和(自身を含む): 42557760

約数和(自身を除く): 20569832

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 88661, 177322, 354644, 709288, 2748491, 5496982, 10993964, 21987928]

約数ペア:

[(1, 21987928), (2, 10993964), (4, 5496982), (8, 2748491), (31, 709288), (62, 354644), (124, 177322), (248, 88661)]