31397960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71359}}^1$

素因数の和:71381

約数の個数: 32

約数和(自身を含む): 77068800

約数和(自身を除く): 45670840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 71359, 142718, 285436, 356795, 570872, 713590, 784949, 1427180, 1569898, 2854360, 3139796, 3924745, 6279592, 7849490, 15698980, 31397960]

約数ペア:

[(1, 31397960), (2, 15698980), (4, 7849490), (5, 6279592), (8, 3924745), (10, 3139796), (11, 2854360), (20, 1569898), (22, 1427180), (40, 784949), (44, 713590), (55, 570872), (88, 356795), (110, 285436), (220, 142718), (440, 71359)]