20157940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{1553}}^1$

素因数の和:1632

約数の個数: 48

約数和(自身を含む): 46992960

約数和(自身を除く): 26835020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 59, 110, 118, 220, 236, 295, 590, 649, 1180, 1298, 1553, 2596, 3106, 3245, 6212, 6490, 7765, 12980, 15530, 17083, 31060, 34166, 68332, 85415, 91627, 170830, 183254, 341660, 366508, 458135, 916270, 1007897, 1832540, 2015794, 4031588, 5039485, 10078970, 20157940]

約数ペア:

[(1, 20157940), (2, 10078970), (4, 5039485), (5, 4031588), (10, 2015794), (11, 1832540), (20, 1007897), (22, 916270), (44, 458135), (55, 366508), (59, 341660), (110, 183254), (118, 170830), (220, 91627), (236, 85415), (295, 68332), (590, 34166), (649, 31060), (1180, 17083), (1298, 15530), (1553, 12980), (2596, 7765), (3106, 6490), (3245, 6212)]