21012723

素因数分解:

$3^3\times {\mathrm{157}}^1\times {\mathrm{4957}}^1$

素因数の和:5123

約数の個数: 16

約数和(自身を含む): 31334560

約数和(自身を除く): 10321837

約数列:

[1, 3, 9, 27, 157, 471, 1413, 4239, 4957, 14871, 44613, 133839, 778249, 2334747, 7004241, 21012723]

約数ペア:

[(1, 21012723), (3, 7004241), (9, 2334747), (27, 778249), (157, 133839), (471, 44613), (1413, 14871), (4239, 4957)]