21645505

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{5197}}^1$

素因数の和:5233

約数の個数: 24

約数和(自身を含む): 31998888

約数和(自身を除く): 10353383

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 5197, 25985, 36379, 88349, 181895, 254653, 441745, 618443, 1273265, 3092215, 4329101, 21645505]

約数ペア:

[(1, 21645505), (5, 4329101), (7, 3092215), (17, 1273265), (35, 618443), (49, 441745), (85, 254653), (119, 181895), (245, 88349), (595, 36379), (833, 25985), (4165, 5197)]