12978825

素因数分解:

$3^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{1321}}^1$

素因数の和:1465

約数の個数: 24

約数和(自身を含む): 21638496

約数和(自身を除く): 8659671

約数列:

[1, 3, 5, 15, 25, 75, 131, 393, 655, 1321, 1965, 3275, 3963, 6605, 9825, 19815, 33025, 99075, 173051, 519153, 865255, 2595765, 4326275, 12978825]

約数ペア:

[(1, 12978825), (3, 4326275), (5, 2595765), (15, 865255), (25, 519153), (75, 173051), (131, 99075), (393, 33025), (655, 19815), (1321, 9825), (1965, 6605), (3275, 3963)]