1820975

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{431}}^1$

素因数の和:467

約数の個数: 18

約数和(自身を含む): 2450736

約数和(自身を除く): 629761

約数列:

[1, 5, 13, 25, 65, 169, 325, 431, 845, 2155, 4225, 5603, 10775, 28015, 72839, 140075, 364195, 1820975]

約数ペア:

[(1, 1820975), (5, 364195), (13, 140075), (25, 72839), (65, 28015), (169, 10775), (325, 5603), (431, 4225), (845, 2155)]