20040377960

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{502517}}^1$

素因数の和:503525

約数の個数: 32

約数和(自身を含む): 45136166760

約数和(自身を除く): 25095788800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1994, 3988, 4985, 7976, 9970, 19940, 39880, 502517, 1005034, 2010068, 2512585, 4020136, 5025170, 10050340, 20100680, 501009449, 1002018898, 2004037796, 2505047245, 4008075592, 5010094490, 10020188980, 20040377960]

約数ペア:

[(1, 20040377960), (2, 10020188980), (4, 5010094490), (5, 4008075592), (8, 2505047245), (10, 2004037796), (20, 1002018898), (40, 501009449), (997, 20100680), (1994, 10050340), (3988, 5025170), (4985, 4020136), (7976, 2512585), (9970, 2010068), (19940, 1005034), (39880, 502517)]