20907800

素因数分解:

$2^3\times 5^2\times {\mathrm{107}}^1\times {\mathrm{977}}^1$

素因数の和:1100

約数の個数: 48

約数和(自身を含む): 49115160

約数和(自身を除く): 28207360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 977, 1070, 1954, 2140, 2675, 3908, 4280, 4885, 5350, 7816, 9770, 10700, 19540, 21400, 24425, 39080, 48850, 97700, 104539, 195400, 209078, 418156, 522695, 836312, 1045390, 2090780, 2613475, 4181560, 5226950, 10453900, 20907800]

約数ペア:

[(1, 20907800), (2, 10453900), (4, 5226950), (5, 4181560), (8, 2613475), (10, 2090780), (20, 1045390), (25, 836312), (40, 522695), (50, 418156), (100, 209078), (107, 195400), (200, 104539), (214, 97700), (428, 48850), (535, 39080), (856, 24425), (977, 21400), (1070, 19540), (1954, 10700), (2140, 9770), (2675, 7816), (3908, 5350), (4280, 4885)]