21261565

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7607}}^1$

素因数の和:7668

約数の個数: 16

約数和(自身を含む): 28119168

約数和(自身を除く): 6857603

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7607, 38035, 98891, 327101, 494455, 1635505, 4252313, 21261565]

約数ペア:

[(1, 21261565), (5, 4252313), (13, 1635505), (43, 494455), (65, 327101), (215, 98891), (559, 38035), (2795, 7607)]