21455987

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1877}}^1$

素因数の和:1978

約数の個数: 16

約数和(自身を含む): 25961472

約数和(自身を除く): 4505485

約数列:

[1, 7, 23, 71, 161, 497, 1633, 1877, 11431, 13139, 43171, 133267, 302197, 932869, 3065141, 21455987]

約数ペア:

[(1, 21455987), (7, 3065141), (23, 932869), (71, 302197), (161, 133267), (497, 43171), (1633, 13139), (1877, 11431)]