20906720

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3187}}^1$

素因数の和:3243

約数の個数: 48

約数和(自身を含む): 50612688

約数和(自身を除く): 29705968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3187, 3280, 6374, 6560, 12748, 15935, 25496, 31870, 50992, 63740, 101984, 127480, 130667, 254960, 261334, 509920, 522668, 653335, 1045336, 1306670, 2090672, 2613340, 4181344, 5226680, 10453360, 20906720]

約数ペア:

[(1, 20906720), (2, 10453360), (4, 5226680), (5, 4181344), (8, 2613340), (10, 2090672), (16, 1306670), (20, 1045336), (32, 653335), (40, 522668), (41, 509920), (80, 261334), (82, 254960), (160, 130667), (164, 127480), (205, 101984), (328, 63740), (410, 50992), (656, 31870), (820, 25496), (1312, 15935), (1640, 12748), (3187, 6560), (3280, 6374)]