21173560

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2687}}^1$

素因数の和:2895

約数の個数: 32

約数和(自身を含む): 47900160

約数和(自身を除く): 26726600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2687, 3940, 5374, 7880, 10748, 13435, 21496, 26870, 53740, 107480, 529339, 1058678, 2117356, 2646695, 4234712, 5293390, 10586780, 21173560]

約数ペア:

[(1, 21173560), (2, 10586780), (4, 5293390), (5, 4234712), (8, 2646695), (10, 2117356), (20, 1058678), (40, 529339), (197, 107480), (394, 53740), (788, 26870), (985, 21496), (1576, 13435), (1970, 10748), (2687, 7880), (3940, 5374)]