21180665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4327}}^1$

素因数の和:4432

約数の個数: 16

約数和(自身を含む): 28045440

約数和(自身を除く): 6864775

約数列:

[1, 5, 11, 55, 89, 445, 979, 4327, 4895, 21635, 47597, 237985, 385103, 1925515, 4236133, 21180665]

約数ペア:

[(1, 21180665), (5, 4236133), (11, 1925515), (55, 385103), (89, 237985), (445, 47597), (979, 21635), (4327, 4895)]