20884820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{1609}}^1$

素因数の和:1688

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 27801580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 59, 110, 118, 220, 236, 295, 590, 649, 1180, 1298, 1609, 2596, 3218, 3245, 6436, 6490, 8045, 12980, 16090, 17699, 32180, 35398, 70796, 88495, 94931, 176990, 189862, 353980, 379724, 474655, 949310, 1044241, 1898620, 2088482, 4176964, 5221205, 10442410, 20884820]

約数ペア:

[(1, 20884820), (2, 10442410), (4, 5221205), (5, 4176964), (10, 2088482), (11, 1898620), (20, 1044241), (22, 949310), (44, 474655), (55, 379724), (59, 353980), (110, 189862), (118, 176990), (220, 94931), (236, 88495), (295, 70796), (590, 35398), (649, 32180), (1180, 17699), (1298, 16090), (1609, 12980), (2596, 8045), (3218, 6490), (3245, 6436)]