20830280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8537}}^1$

素因数の和:8609

約数の個数: 32

約数和(自身を含む): 47642040

約数和(自身を除く): 26811760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8537, 17074, 34148, 42685, 68296, 85370, 170740, 341480, 520757, 1041514, 2083028, 2603785, 4166056, 5207570, 10415140, 20830280]

約数ペア:

[(1, 20830280), (2, 10415140), (4, 5207570), (5, 4166056), (8, 2603785), (10, 2083028), (20, 1041514), (40, 520757), (61, 341480), (122, 170740), (244, 85370), (305, 68296), (488, 42685), (610, 34148), (1220, 17074), (2440, 8537)]