21311180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{617}}^1$

素因数の和:794

約数の個数: 48

約数和(自身を含む): 49212576

約数和(自身を除く): 27901396

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 157, 220, 314, 617, 628, 785, 1234, 1570, 1727, 2468, 3085, 3140, 3454, 6170, 6787, 6908, 8635, 12340, 13574, 17270, 27148, 33935, 34540, 67870, 96869, 135740, 193738, 387476, 484345, 968690, 1065559, 1937380, 2131118, 4262236, 5327795, 10655590, 21311180]

約数ペア:

[(1, 21311180), (2, 10655590), (4, 5327795), (5, 4262236), (10, 2131118), (11, 1937380), (20, 1065559), (22, 968690), (44, 484345), (55, 387476), (110, 193738), (157, 135740), (220, 96869), (314, 67870), (617, 34540), (628, 33935), (785, 27148), (1234, 17270), (1570, 13574), (1727, 12340), (2468, 8635), (3085, 6908), (3140, 6787), (3454, 6170)]