81997960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{1187}}^1$

素因数の和:1366

約数の個数: 64

約数和(自身を含む): 202720320

約数和(自身を除く): 120722360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 157, 220, 314, 440, 628, 785, 1187, 1256, 1570, 1727, 2374, 3140, 3454, 4748, 5935, 6280, 6908, 8635, 9496, 11870, 13057, 13816, 17270, 23740, 26114, 34540, 47480, 52228, 65285, 69080, 104456, 130570, 186359, 261140, 372718, 522280, 745436, 931795, 1490872, 1863590, 2049949, 3727180, 4099898, 7454360, 8199796, 10249745, 16399592, 20499490, 40998980, 81997960]

約数ペア:

[(1, 81997960), (2, 40998980), (4, 20499490), (5, 16399592), (8, 10249745), (10, 8199796), (11, 7454360), (20, 4099898), (22, 3727180), (40, 2049949), (44, 1863590), (55, 1490872), (88, 931795), (110, 745436), (157, 522280), (220, 372718), (314, 261140), (440, 186359), (628, 130570), (785, 104456), (1187, 69080), (1256, 65285), (1570, 52228), (1727, 47480), (2374, 34540), (3140, 26114), (3454, 23740), (4748, 17270), (5935, 13816), (6280, 13057), (6908, 11870), (8635, 9496)]