18471940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 40626432

約数和(自身を除く): 22154492

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 457, 470, 860, 914, 940, 1828, 2021, 2285, 4042, 4570, 8084, 9140, 10105, 19651, 20210, 21479, 39302, 40420, 42958, 78604, 85916, 98255, 107395, 196510, 214790, 393020, 429580, 923597, 1847194, 3694388, 4617985, 9235970, 18471940]

約数ペア:

[(1, 18471940), (2, 9235970), (4, 4617985), (5, 3694388), (10, 1847194), (20, 923597), (43, 429580), (47, 393020), (86, 214790), (94, 196510), (172, 107395), (188, 98255), (215, 85916), (235, 78604), (430, 42958), (457, 40420), (470, 39302), (860, 21479), (914, 20210), (940, 19651), (1828, 10105), (2021, 9140), (2285, 8084), (4042, 4570)]