21013750

素因数分解:

$2^1\times 5^4\times {\mathrm{16811}}^1$

素因数の和:16833

約数の個数: 20

約数和(自身を含む): 39390516

約数和(自身を除く): 18376766

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 16811, 33622, 84055, 168110, 420275, 840550, 2101375, 4202750, 10506875, 21013750]

約数ペア:

[(1, 21013750), (2, 10506875), (5, 4202750), (10, 2101375), (25, 840550), (50, 420275), (125, 168110), (250, 84055), (625, 33622), (1250, 16811)]