20651500

素因数分解:

$2^2\times 5^3\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:523

約数の個数: 48

約数和(自身を含む): 45654336

約数和(自身を除く): 25002836

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 103, 125, 206, 250, 401, 412, 500, 515, 802, 1030, 1604, 2005, 2060, 2575, 4010, 5150, 8020, 10025, 10300, 12875, 20050, 25750, 40100, 41303, 50125, 51500, 82606, 100250, 165212, 200500, 206515, 413030, 826060, 1032575, 2065150, 4130300, 5162875, 10325750, 20651500]

約数ペア:

[(1, 20651500), (2, 10325750), (4, 5162875), (5, 4130300), (10, 2065150), (20, 1032575), (25, 826060), (50, 413030), (100, 206515), (103, 200500), (125, 165212), (206, 100250), (250, 82606), (401, 51500), (412, 50125), (500, 41303), (515, 40100), (802, 25750), (1030, 20050), (1604, 12875), (2005, 10300), (2060, 10025), (2575, 8020), (4010, 5150)]