21016665

素因数分解:

$3^4\times 5^1\times {\mathrm{51893}}^1$

素因数の和:51910

約数の個数: 20

約数和(自身を含む): 37675044

約数和(自身を除く): 16658379

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51893, 155679, 259465, 467037, 778395, 1401111, 2335185, 4203333, 7005555, 21016665]

約数ペア:

[(1, 21016665), (3, 7005555), (5, 4203333), (9, 2335185), (15, 1401111), (27, 778395), (45, 467037), (81, 259465), (135, 155679), (405, 51893)]