64721209

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:397

約数の個数: 24

約数和(自身を含む): 77811840

約数和(自身を除く): 13090631

約数列:

[1, 7, 47, 49, 157, 179, 329, 1099, 1253, 2303, 7379, 7693, 8413, 8771, 28103, 51653, 58891, 196721, 361571, 412237, 1320841, 1377047, 9245887, 64721209]

約数ペア:

[(1, 64721209), (7, 9245887), (47, 1377047), (49, 1320841), (157, 412237), (179, 361571), (329, 196721), (1099, 58891), (1253, 51653), (2303, 28103), (7379, 8771), (7693, 8413)]