21190953

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7703}}^1$

素因数の和:7844

約数の個数: 16

約数和(自身を含む): 32541696

約数和(自身を除く): 11350743

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7703, 23109, 53921, 161763, 1009093, 3027279, 7063651, 21190953]

約数ペア:

[(1, 21190953), (3, 7063651), (7, 3027279), (21, 1009093), (131, 161763), (393, 53921), (917, 23109), (2751, 7703)]