21089375

素因数分解:

$5^4\times {\mathrm{41}}^1\times {\mathrm{823}}^1$

素因数の和:884

約数の個数: 20

約数和(自身を含む): 27028848

約数和(自身を除く): 5939473

約数列:

[1, 5, 25, 41, 125, 205, 625, 823, 1025, 4115, 5125, 20575, 25625, 33743, 102875, 168715, 514375, 843575, 4217875, 21089375]

約数ペア:

[(1, 21089375), (5, 4217875), (25, 843575), (41, 514375), (125, 168715), (205, 102875), (625, 33743), (823, 25625), (1025, 20575), (4115, 5125)]