21173225

素因数分解:

$5^2\times {\mathrm{23}}^2\times {\mathrm{1601}}^1$

素因数の和:1657

約数の個数: 18

約数和(自身を含む): 27463086

約数和(自身を除く): 6289861

約数列:

[1, 5, 23, 25, 115, 529, 575, 1601, 2645, 8005, 13225, 36823, 40025, 184115, 846929, 920575, 4234645, 21173225]

約数ペア:

[(1, 21173225), (5, 4234645), (23, 920575), (25, 846929), (115, 184115), (529, 40025), (575, 36823), (1601, 13225), (2645, 8005)]