21180740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21613}}^1$

素因数の和:21636

約数の個数: 36

約数和(自身を含む): 51743916

約数和(自身を除く): 30563176

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21613, 43226, 86452, 108065, 151291, 216130, 302582, 432260, 605164, 756455, 1059037, 1512910, 2118074, 3025820, 4236148, 5295185, 10590370, 21180740]

約数ペア:

[(1, 21180740), (2, 10590370), (4, 5295185), (5, 4236148), (7, 3025820), (10, 2118074), (14, 1512910), (20, 1059037), (28, 756455), (35, 605164), (49, 432260), (70, 302582), (98, 216130), (140, 151291), (196, 108065), (245, 86452), (490, 43226), (980, 21613)]