21990921

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{3581}}^1$

素因数の和:3696

約数の個数: 16

約数和(自身を含む): 30948480

約数和(自身を除く): 8957559

約数列:

[1, 3, 23, 69, 89, 267, 2047, 3581, 6141, 10743, 82363, 247089, 318709, 956127, 7330307, 21990921]

約数ペア:

[(1, 21990921), (3, 7330307), (23, 956127), (69, 318709), (89, 247089), (267, 82363), (2047, 10743), (3581, 6141)]