21812679

素因数分解:

$3^3\times 7^1\times {\mathrm{131}}^1\times {\mathrm{881}}^1$

素因数の和:1028

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 15443001

約数列:

[1, 3, 7, 9, 21, 27, 63, 131, 189, 393, 881, 917, 1179, 2643, 2751, 3537, 6167, 7929, 8253, 18501, 23787, 24759, 55503, 115411, 166509, 346233, 807877, 1038699, 2423631, 3116097, 7270893, 21812679]

約数ペア:

[(1, 21812679), (3, 7270893), (7, 3116097), (9, 2423631), (21, 1038699), (27, 807877), (63, 346233), (131, 166509), (189, 115411), (393, 55503), (881, 24759), (917, 23787), (1179, 18501), (2643, 8253), (2751, 7929), (3537, 6167)]