21372760

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1531}}^1$

素因数の和:1891

約数の個数: 32

約数和(自身を含む): 48258000

約数和(自身を除く): 26885240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1531, 1745, 2792, 3062, 3490, 6124, 6980, 7655, 12248, 13960, 15310, 30620, 61240, 534319, 1068638, 2137276, 2671595, 4274552, 5343190, 10686380, 21372760]

約数ペア:

[(1, 21372760), (2, 10686380), (4, 5343190), (5, 4274552), (8, 2671595), (10, 2137276), (20, 1068638), (40, 534319), (349, 61240), (698, 30620), (1396, 15310), (1531, 13960), (1745, 12248), (2792, 7655), (3062, 6980), (3490, 6124)]