20684840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{887}}^1$

素因数の和:962

約数の個数: 64

約数和(自身を含む): 51788160

約数和(自身を除く): 31103320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 887, 1060, 1166, 1774, 2120, 2332, 2915, 3548, 4435, 4664, 5830, 7096, 8870, 9757, 11660, 17740, 19514, 23320, 35480, 39028, 47011, 48785, 78056, 94022, 97570, 188044, 195140, 235055, 376088, 390280, 470110, 517121, 940220, 1034242, 1880440, 2068484, 2585605, 4136968, 5171210, 10342420, 20684840]

約数ペア:

[(1, 20684840), (2, 10342420), (4, 5171210), (5, 4136968), (8, 2585605), (10, 2068484), (11, 1880440), (20, 1034242), (22, 940220), (40, 517121), (44, 470110), (53, 390280), (55, 376088), (88, 235055), (106, 195140), (110, 188044), (212, 97570), (220, 94022), (265, 78056), (424, 48785), (440, 47011), (530, 39028), (583, 35480), (887, 23320), (1060, 19514), (1166, 17740), (1774, 11660), (2120, 9757), (2332, 8870), (2915, 7096), (3548, 5830), (4435, 4664)]