21987272

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{30881}}^1$

素因数の和:30976

約数の個数: 16

約数和(自身を含む): 41690700

約数和(自身を除く): 19703428

約数列:

[1, 2, 4, 8, 89, 178, 356, 712, 30881, 61762, 123524, 247048, 2748409, 5496818, 10993636, 21987272]

約数ペア:

[(1, 21987272), (2, 10993636), (4, 5496818), (8, 2748409), (89, 247048), (178, 123524), (356, 61762), (712, 30881)]