20649020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1867}}^1$

素因数の和:1962

約数の個数: 48

約数和(自身を含む): 50211840

約数和(自身を除く): 29562820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 1867, 2212, 2765, 3734, 5530, 7468, 9335, 11060, 13069, 18670, 26138, 37340, 52276, 65345, 130690, 147493, 261380, 294986, 589972, 737465, 1032451, 1474930, 2064902, 2949860, 4129804, 5162255, 10324510, 20649020]

約数ペア:

[(1, 20649020), (2, 10324510), (4, 5162255), (5, 4129804), (7, 2949860), (10, 2064902), (14, 1474930), (20, 1032451), (28, 737465), (35, 589972), (70, 294986), (79, 261380), (140, 147493), (158, 130690), (316, 65345), (395, 52276), (553, 37340), (790, 26138), (1106, 18670), (1580, 13069), (1867, 11060), (2212, 9335), (2765, 7468), (3734, 5530)]