21012831

素因数分解:

$3^3\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1523}}^1$

素因数の和:1612

約数の個数: 32

約数和(自身を含む): 36088320

約数和(自身を除く): 15075489

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 189, 219, 511, 657, 1523, 1533, 1971, 4569, 4599, 10661, 13707, 13797, 31983, 41121, 95949, 111179, 287847, 333537, 778253, 1000611, 2334759, 3001833, 7004277, 21012831]

約数ペア:

[(1, 21012831), (3, 7004277), (7, 3001833), (9, 2334759), (21, 1000611), (27, 778253), (63, 333537), (73, 287847), (189, 111179), (219, 95949), (511, 41121), (657, 31983), (1523, 13797), (1533, 13707), (1971, 10661), (4569, 4599)]