21382960

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1951}}^1$

素因数の和:2101

約数の個数: 40

約数和(自身を含む): 50103936

約数和(自身を除く): 28720976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 1951, 2192, 2740, 3902, 5480, 7804, 9755, 10960, 15608, 19510, 31216, 39020, 78040, 156080, 267287, 534574, 1069148, 1336435, 2138296, 2672870, 4276592, 5345740, 10691480, 21382960]

約数ペア:

[(1, 21382960), (2, 10691480), (4, 5345740), (5, 4276592), (8, 2672870), (10, 2138296), (16, 1336435), (20, 1069148), (40, 534574), (80, 267287), (137, 156080), (274, 78040), (548, 39020), (685, 31216), (1096, 19510), (1370, 15608), (1951, 10960), (2192, 9755), (2740, 7804), (3902, 5480)]