21440816

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70529}}^1$

素因数の和:70556

約数の個数: 20

約数和(自身を含む): 43728600

約数和(自身を除く): 22287784

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70529, 141058, 282116, 564232, 1128464, 1340051, 2680102, 5360204, 10720408, 21440816]

約数ペア:

[(1, 21440816), (2, 10720408), (4, 5360204), (8, 2680102), (16, 1340051), (19, 1128464), (38, 564232), (76, 282116), (152, 141058), (304, 70529)]