21857960

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{5107}}^1$

素因数の和:5225

約数の個数: 32

約数和(自身を含む): 49649760

約数和(自身を除く): 27791800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 5107, 10214, 20428, 25535, 40856, 51070, 102140, 204280, 546449, 1092898, 2185796, 2732245, 4371592, 5464490, 10928980, 21857960]

約数ペア:

[(1, 21857960), (2, 10928980), (4, 5464490), (5, 4371592), (8, 2732245), (10, 2185796), (20, 1092898), (40, 546449), (107, 204280), (214, 102140), (428, 51070), (535, 40856), (856, 25535), (1070, 20428), (2140, 10214), (4280, 5107)]