19993659

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{431}}^1$

素因数の和:535

約数の個数: 24

約数和(自身を含む): 31200768

約数和(自身を除く): 11207109

約数列:

[1, 3, 7, 21, 47, 141, 329, 431, 987, 1293, 2209, 3017, 6627, 9051, 15463, 20257, 46389, 60771, 141799, 425397, 952079, 2856237, 6664553, 19993659]

約数ペア:

[(1, 19993659), (3, 6664553), (7, 2856237), (21, 952079), (47, 425397), (141, 141799), (329, 60771), (431, 46389), (987, 20257), (1293, 15463), (2209, 9051), (3017, 6627)]