20865500

素因数分解:

$2^2\times 5^3\times {\mathrm{29}}^1\times {\mathrm{1439}}^1$

素因数の和:1487

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26308900

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 125, 145, 250, 290, 500, 580, 725, 1439, 1450, 2878, 2900, 3625, 5756, 7195, 7250, 14390, 14500, 28780, 35975, 41731, 71950, 83462, 143900, 166924, 179875, 208655, 359750, 417310, 719500, 834620, 1043275, 2086550, 4173100, 5216375, 10432750, 20865500]

約数ペア:

[(1, 20865500), (2, 10432750), (4, 5216375), (5, 4173100), (10, 2086550), (20, 1043275), (25, 834620), (29, 719500), (50, 417310), (58, 359750), (100, 208655), (116, 179875), (125, 166924), (145, 143900), (250, 83462), (290, 71950), (500, 41731), (580, 35975), (725, 28780), (1439, 14500), (1450, 14390), (2878, 7250), (2900, 7195), (3625, 5756)]