21291825

素因数分解:

$3^1\times 5^2\times {\mathrm{313}}^1\times {\mathrm{907}}^1$

素因数の和:1233

約数の個数: 24

約数和(自身を含む): 35353888

約数和(自身を除く): 14062063

約数列:

[1, 3, 5, 15, 25, 75, 313, 907, 939, 1565, 2721, 4535, 4695, 7825, 13605, 22675, 23475, 68025, 283891, 851673, 1419455, 4258365, 7097275, 21291825]

約数ペア:

[(1, 21291825), (3, 7097275), (5, 4258365), (15, 1419455), (25, 851673), (75, 283891), (313, 68025), (907, 23475), (939, 22675), (1565, 13605), (2721, 7825), (4535, 4695)]