20810153

素因数分解:

$7^3\times {\mathrm{13}}^2\times {\mathrm{359}}^1$

素因数の和:406

約数の個数: 24

約数和(自身を含む): 26352000

約数和(自身を除く): 5541847

約数列:

[1, 7, 13, 49, 91, 169, 343, 359, 637, 1183, 2513, 4459, 4667, 8281, 17591, 32669, 57967, 60671, 123137, 228683, 424697, 1600781, 2972879, 20810153]

約数ペア:

[(1, 20810153), (7, 2972879), (13, 1600781), (49, 424697), (91, 228683), (169, 123137), (343, 60671), (359, 57967), (637, 32669), (1183, 17591), (2513, 8281), (4459, 4667)]