12971721

素因数分解:

$3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1117}}^1$

素因数の和:1213

約数の個数: 24

約数和(自身を含む): 20392320

約数和(自身を除く): 7420599

約数列:

[1, 3, 7, 21, 49, 79, 147, 237, 553, 1117, 1659, 3351, 3871, 7819, 11613, 23457, 54733, 88243, 164199, 264729, 617701, 1853103, 4323907, 12971721]

約数ペア:

[(1, 12971721), (3, 4323907), (7, 1853103), (21, 617701), (49, 264729), (79, 164199), (147, 88243), (237, 54733), (553, 23457), (1117, 11613), (1659, 7819), (3351, 3871)]