20405567

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{367}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 25860096

約数和(自身を除く): 5454529

約数列:

[1, 7, 13, 47, 91, 169, 329, 367, 611, 1183, 2569, 4277, 4771, 7943, 17249, 33397, 55601, 62023, 120743, 224237, 434161, 1569659, 2915081, 20405567]

約数ペア:

[(1, 20405567), (7, 2915081), (13, 1569659), (47, 434161), (91, 224237), (169, 120743), (329, 62023), (367, 55601), (611, 33397), (1183, 17249), (2569, 7943), (4277, 4771)]