21982145

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 29376000

約数和(自身を除く): 7393855

約数列:

[1, 5, 19, 29, 79, 95, 101, 145, 395, 505, 551, 1501, 1919, 2291, 2755, 2929, 7505, 7979, 9595, 11455, 14645, 39895, 43529, 55651, 151601, 217645, 231391, 278255, 758005, 1156955, 4396429, 21982145]

約数ペア:

[(1, 21982145), (5, 4396429), (19, 1156955), (29, 758005), (79, 278255), (95, 231391), (101, 217645), (145, 151601), (395, 55651), (505, 43529), (551, 39895), (1501, 14645), (1919, 11455), (2291, 9595), (2755, 7979), (2929, 7505)]