21987754

素因数分解:

$2^1\times {\mathrm{79}}^1\times {\mathrm{317}}^1\times {\mathrm{439}}^1$

素因数の和:837

約数の個数: 16

約数和(自身を含む): 33580800

約数和(自身を除く): 11593046

約数列:

[1, 2, 79, 158, 317, 439, 634, 878, 25043, 34681, 50086, 69362, 139163, 278326, 10993877, 21987754]

約数ペア:

[(1, 21987754), (2, 10993877), (79, 278326), (158, 139163), (317, 69362), (439, 50086), (634, 34681), (878, 25043)]