20557000

素因数分解:

$2^3\times 5^3\times {\mathrm{61}}^1\times {\mathrm{337}}^1$

素因数の和:419

約数の個数: 64

約数和(自身を含む): 49037040

約数和(自身を除く): 28480040

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 200, 244, 250, 305, 337, 488, 500, 610, 674, 1000, 1220, 1348, 1525, 1685, 2440, 2696, 3050, 3370, 6100, 6740, 7625, 8425, 12200, 13480, 15250, 16850, 20557, 30500, 33700, 41114, 42125, 61000, 67400, 82228, 84250, 102785, 164456, 168500, 205570, 337000, 411140, 513925, 822280, 1027850, 2055700, 2569625, 4111400, 5139250, 10278500, 20557000]

約数ペア:

[(1, 20557000), (2, 10278500), (4, 5139250), (5, 4111400), (8, 2569625), (10, 2055700), (20, 1027850), (25, 822280), (40, 513925), (50, 411140), (61, 337000), (100, 205570), (122, 168500), (125, 164456), (200, 102785), (244, 84250), (250, 82228), (305, 67400), (337, 61000), (488, 42125), (500, 41114), (610, 33700), (674, 30500), (1000, 20557), (1220, 16850), (1348, 15250), (1525, 13480), (1685, 12200), (2440, 8425), (2696, 7625), (3050, 6740), (3370, 6100)]