21885025

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:345

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6238175

約数列:

[1, 5, 25, 53, 83, 199, 265, 415, 995, 1325, 2075, 4399, 4975, 10547, 16517, 21995, 52735, 82585, 109975, 263675, 412925, 875401, 4377005, 21885025]

約数ペア:

[(1, 21885025), (5, 4377005), (25, 875401), (53, 412925), (83, 263675), (199, 109975), (265, 82585), (415, 52735), (995, 21995), (1325, 16517), (2075, 10547), (4399, 4975)]