20405200

素因数分解:

$2^4\times 5^2\times {\mathrm{139}}^1\times {\mathrm{367}}^1$

素因数の和:524

約数の個数: 60

約数和(自身を含む): 49510720

約数和(自身を除く): 29105520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 139, 200, 278, 367, 400, 556, 695, 734, 1112, 1390, 1468, 1835, 2224, 2780, 2936, 3475, 3670, 5560, 5872, 6950, 7340, 9175, 11120, 13900, 14680, 18350, 27800, 29360, 36700, 51013, 55600, 73400, 102026, 146800, 204052, 255065, 408104, 510130, 816208, 1020260, 1275325, 2040520, 2550650, 4081040, 5101300, 10202600, 20405200]

約数ペア:

[(1, 20405200), (2, 10202600), (4, 5101300), (5, 4081040), (8, 2550650), (10, 2040520), (16, 1275325), (20, 1020260), (25, 816208), (40, 510130), (50, 408104), (80, 255065), (100, 204052), (139, 146800), (200, 102026), (278, 73400), (367, 55600), (400, 51013), (556, 36700), (695, 29360), (734, 27800), (1112, 18350), (1390, 14680), (1468, 13900), (1835, 11120), (2224, 9175), (2780, 7340), (2936, 6950), (3475, 5872), (3670, 5560)]