21815805

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{1213}}^1$

素因数の和:1341

約数の個数: 32

約数和(自身を含む): 38459520

約数和(自身を除く): 16643715

約数列:

[1, 3, 5, 11, 15, 33, 55, 109, 165, 327, 545, 1199, 1213, 1635, 3597, 3639, 5995, 6065, 13343, 17985, 18195, 40029, 66715, 132217, 200145, 396651, 661085, 1454387, 1983255, 4363161, 7271935, 21815805]

約数ペア:

[(1, 21815805), (3, 7271935), (5, 4363161), (11, 1983255), (15, 1454387), (33, 661085), (55, 396651), (109, 200145), (165, 132217), (327, 66715), (545, 40029), (1199, 18195), (1213, 17985), (1635, 13343), (3597, 6065), (3639, 5995)]