209905475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{28081}}^1$

素因数の和:28127

約数の個数: 24

約数和(自身を含む): 292502112

約数和(自身を除く): 82596637

約数列:

[1, 5, 13, 23, 25, 65, 115, 299, 325, 575, 1495, 7475, 28081, 140405, 365053, 645863, 702025, 1825265, 3229315, 8396219, 9126325, 16146575, 41981095, 209905475]

約数ペア:

[(1, 209905475), (5, 41981095), (13, 16146575), (23, 9126325), (25, 8396219), (65, 3229315), (115, 1825265), (299, 702025), (325, 645863), (575, 365053), (1495, 140405), (7475, 28081)]