21809957

素因数分解:

${\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 25579008

約数和(自身を除く): 3769051

約数列:

[1, 13, 23, 31, 169, 181, 299, 403, 713, 2353, 3887, 4163, 5239, 5611, 9269, 30589, 54119, 72943, 120497, 129053, 703547, 948259, 1677689, 21809957]

約数ペア:

[(1, 21809957), (13, 1677689), (23, 948259), (31, 703547), (169, 129053), (181, 120497), (299, 72943), (403, 54119), (713, 30589), (2353, 9269), (3887, 5611), (4163, 5239)]