20550551

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 25127424

約数和(自身を除く): 4576873

約数列:

[1, 7, 31, 49, 83, 163, 217, 581, 1141, 1519, 2573, 4067, 5053, 7987, 13529, 18011, 35371, 94703, 126077, 247597, 419399, 662921, 2935793, 20550551]

約数ペア:

[(1, 20550551), (7, 2935793), (31, 662921), (49, 419399), (83, 247597), (163, 126077), (217, 94703), (581, 35371), (1141, 18011), (1519, 13529), (2573, 7987), (4067, 5053)]