21091250

素因数分解:

$2^1\times 5^4\times {\mathrm{47}}^1\times {\mathrm{359}}^1$

素因数の和:428

約数の個数: 40

約数和(自身を含む): 40487040

約数和(自身を除く): 19395790

約数列:

[1, 2, 5, 10, 25, 47, 50, 94, 125, 235, 250, 359, 470, 625, 718, 1175, 1250, 1795, 2350, 3590, 5875, 8975, 11750, 16873, 17950, 29375, 33746, 44875, 58750, 84365, 89750, 168730, 224375, 421825, 448750, 843650, 2109125, 4218250, 10545625, 21091250]

約数ペア:

[(1, 21091250), (2, 10545625), (5, 4218250), (10, 2109125), (25, 843650), (47, 448750), (50, 421825), (94, 224375), (125, 168730), (235, 89750), (250, 84365), (359, 58750), (470, 44875), (625, 33746), (718, 29375), (1175, 17950), (1250, 16873), (1795, 11750), (2350, 8975), (3590, 5875)]