21065457

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9739}}^1$

素因数の和:9852

約数の個数: 16

約数和(自身を含む): 32414720

約数和(自身を除く): 11349263

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9739, 29217, 68173, 204519, 1003117, 3009351, 7021819, 21065457]

約数ペア:

[(1, 21065457), (3, 7021819), (7, 3009351), (21, 1003117), (103, 204519), (309, 68173), (721, 29217), (2163, 9739)]