20950180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{881}}^1$

素因数の和:960

約数の個数: 48

約数和(自身を含む): 46675440

約数和(自身を除く): 25725260

約数列:

[1, 2, 4, 5, 10, 20, 29, 41, 58, 82, 116, 145, 164, 205, 290, 410, 580, 820, 881, 1189, 1762, 2378, 3524, 4405, 4756, 5945, 8810, 11890, 17620, 23780, 25549, 36121, 51098, 72242, 102196, 127745, 144484, 180605, 255490, 361210, 510980, 722420, 1047509, 2095018, 4190036, 5237545, 10475090, 20950180]

約数ペア:

[(1, 20950180), (2, 10475090), (4, 5237545), (5, 4190036), (10, 2095018), (20, 1047509), (29, 722420), (41, 510980), (58, 361210), (82, 255490), (116, 180605), (145, 144484), (164, 127745), (205, 102196), (290, 72242), (410, 51098), (580, 36121), (820, 25549), (881, 23780), (1189, 17620), (1762, 11890), (2378, 8810), (3524, 5945), (4405, 4756)]