21005225

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:337

約数の個数: 24

約数和(自身を含む): 26998272

約数和(自身を除く): 5993047

約数列:

[1, 5, 25, 53, 83, 191, 265, 415, 955, 1325, 2075, 4399, 4775, 10123, 15853, 21995, 50615, 79265, 109975, 253075, 396325, 840209, 4201045, 21005225]

約数ペア:

[(1, 21005225), (5, 4201045), (25, 840209), (53, 396325), (83, 253075), (191, 109975), (265, 79265), (415, 50615), (955, 21995), (1325, 15853), (2075, 10123), (4399, 4775)]