18863240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{997}}^1$

素因数の和:1062

約数の個数: 64

約数和(自身を含む): 47424960

約数和(自身を除く): 28561720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 997, 1720, 1892, 1994, 2365, 3784, 3988, 4730, 4985, 7976, 9460, 9970, 10967, 18920, 19940, 21934, 39880, 42871, 43868, 54835, 85742, 87736, 109670, 171484, 214355, 219340, 342968, 428710, 438680, 471581, 857420, 943162, 1714840, 1886324, 2357905, 3772648, 4715810, 9431620, 18863240]

約数ペア:

[(1, 18863240), (2, 9431620), (4, 4715810), (5, 3772648), (8, 2357905), (10, 1886324), (11, 1714840), (20, 943162), (22, 857420), (40, 471581), (43, 438680), (44, 428710), (55, 342968), (86, 219340), (88, 214355), (110, 171484), (172, 109670), (215, 87736), (220, 85742), (344, 54835), (430, 43868), (440, 42871), (473, 39880), (860, 21934), (946, 19940), (997, 18920), (1720, 10967), (1892, 9970), (1994, 9460), (2365, 7976), (3784, 4985), (3988, 4730)]