20570020

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{277}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 44835840

約数和(自身を除く): 24265820

約数列:

[1, 2, 4, 5, 10, 20, 47, 79, 94, 158, 188, 235, 277, 316, 395, 470, 554, 790, 940, 1108, 1385, 1580, 2770, 3713, 5540, 7426, 13019, 14852, 18565, 21883, 26038, 37130, 43766, 52076, 65095, 74260, 87532, 109415, 130190, 218830, 260380, 437660, 1028501, 2057002, 4114004, 5142505, 10285010, 20570020]

約数ペア:

[(1, 20570020), (2, 10285010), (4, 5142505), (5, 4114004), (10, 2057002), (20, 1028501), (47, 437660), (79, 260380), (94, 218830), (158, 130190), (188, 109415), (235, 87532), (277, 74260), (316, 65095), (395, 52076), (470, 43766), (554, 37130), (790, 26038), (940, 21883), (1108, 18565), (1385, 14852), (1580, 13019), (2770, 7426), (3713, 5540)]