21815505

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28517}}^1$

素因数の和:28545

約数の個数: 24

約数和(自身を含む): 40039272

約数和(自身を除く): 18223767

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28517, 85551, 142585, 256653, 427755, 484789, 1283265, 1454367, 2423945, 4363101, 7271835, 21815505]

約数ペア:

[(1, 21815505), (3, 7271835), (5, 4363101), (9, 2423945), (15, 1454367), (17, 1283265), (45, 484789), (51, 427755), (85, 256653), (153, 142585), (255, 85551), (765, 28517)]