21028539

素因数分解:

$3^1\times 7^1\times {\mathrm{439}}^1\times {\mathrm{2281}}^1$

素因数の和:2730

約数の個数: 16

約数和(自身を含む): 32130560

約数和(自身を除く): 11102021

約数列:

[1, 3, 7, 21, 439, 1317, 2281, 3073, 6843, 9219, 15967, 47901, 1001359, 3004077, 7009513, 21028539]

約数ペア:

[(1, 21028539), (3, 7009513), (7, 3004077), (21, 1001359), (439, 47901), (1317, 15967), (2281, 9219), (3073, 6843)]