21001220

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36209}}^1$

素因数の和:36247

約数の個数: 24

約数和(自身を含む): 45624600

約数和(自身を除く): 24623380

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36209, 72418, 144836, 181045, 362090, 724180, 1050061, 2100122, 4200244, 5250305, 10500610, 21001220]

約数ペア:

[(1, 21001220), (2, 10500610), (4, 5250305), (5, 4200244), (10, 2100122), (20, 1050061), (29, 724180), (58, 362090), (116, 181045), (145, 144836), (290, 72418), (580, 36209)]