21497861

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{3137}}^1$

素因数の和:3244

約数の個数: 16

約数和(自身を含む): 27112320

約数和(自身を除く): 5614459

約数列:

[1, 7, 11, 77, 89, 623, 979, 3137, 6853, 21959, 34507, 241549, 279193, 1954351, 3071123, 21497861]

約数ペア:

[(1, 21497861), (7, 3071123), (11, 1954351), (77, 279193), (89, 241549), (623, 34507), (979, 21959), (3137, 6853)]