21193739

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{967}}^1$

素因数の和:1106

約数の個数: 16

約数和(自身を含む): 25276416

約数和(自身を除く): 4082677

約数列:

[1, 7, 31, 101, 217, 707, 967, 3131, 6769, 21917, 29977, 97667, 209839, 683669, 3027677, 21193739]

約数ペア:

[(1, 21193739), (7, 3027677), (31, 683669), (101, 209839), (217, 97667), (707, 29977), (967, 21917), (3131, 6769)]