20621360

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6287}}^1$

素因数の和:6341

約数の個数: 40

約数和(自身を含む): 49121856

約数和(自身を除く): 28500496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6287, 12574, 25148, 31435, 50296, 62870, 100592, 125740, 251480, 257767, 502960, 515534, 1031068, 1288835, 2062136, 2577670, 4124272, 5155340, 10310680, 20621360]

約数ペア:

[(1, 20621360), (2, 10310680), (4, 5155340), (5, 4124272), (8, 2577670), (10, 2062136), (16, 1288835), (20, 1031068), (40, 515534), (41, 502960), (80, 257767), (82, 251480), (164, 125740), (205, 100592), (328, 62870), (410, 50296), (656, 31435), (820, 25148), (1640, 12574), (3280, 6287)]