21128200

素因数分解:

$2^3\times 5^2\times {\mathrm{149}}^1\times {\mathrm{709}}^1$

素因数の和:874

約数の個数: 48

約数和(自身を含む): 49522500

約数和(自身を除く): 28394300

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 149, 200, 298, 596, 709, 745, 1192, 1418, 1490, 2836, 2980, 3545, 3725, 5672, 5960, 7090, 7450, 14180, 14900, 17725, 28360, 29800, 35450, 70900, 105641, 141800, 211282, 422564, 528205, 845128, 1056410, 2112820, 2641025, 4225640, 5282050, 10564100, 21128200]

約数ペア:

[(1, 21128200), (2, 10564100), (4, 5282050), (5, 4225640), (8, 2641025), (10, 2112820), (20, 1056410), (25, 845128), (40, 528205), (50, 422564), (100, 211282), (149, 141800), (200, 105641), (298, 70900), (596, 35450), (709, 29800), (745, 28360), (1192, 17725), (1418, 14900), (1490, 14180), (2836, 7450), (2980, 7090), (3545, 5960), (3725, 5672)]