21560917

素因数分解:

$7^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{307}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 25231360

約数和(自身を除く): 3670443

約数列:

[1, 7, 79, 127, 307, 553, 889, 2149, 10033, 24253, 38989, 70231, 169771, 272923, 3080131, 21560917]

約数ペア:

[(1, 21560917), (7, 3080131), (79, 272923), (127, 169771), (307, 70231), (553, 38989), (889, 24253), (2149, 10033)]