21807539

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1021}}^1$

素因数の和:1118

約数の個数: 16

約数和(自身を含む): 24724224

約数和(自身を除く): 2916685

約数列:

[1, 13, 31, 53, 403, 689, 1021, 1643, 13273, 21359, 31651, 54113, 411463, 703469, 1677503, 21807539]

約数ペア:

[(1, 21807539), (13, 1677503), (31, 703469), (53, 411463), (403, 54113), (689, 31651), (1021, 21359), (1643, 13273)]