20678955

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{5449}}^1$

素因数の和:5491

約数の個数: 32

約数和(自身を含む): 37670400

約数和(自身を除く): 16991445

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 253, 345, 759, 1265, 3795, 5449, 16347, 27245, 59939, 81735, 125327, 179817, 299695, 375981, 626635, 899085, 1378597, 1879905, 4135791, 6892985, 20678955]

約数ペア:

[(1, 20678955), (3, 6892985), (5, 4135791), (11, 1879905), (15, 1378597), (23, 899085), (33, 626635), (55, 375981), (69, 299695), (115, 179817), (165, 125327), (253, 81735), (345, 59939), (759, 27245), (1265, 16347), (3795, 5449)]