18388020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{43781}}^1$

素因数の和:43800

約数の個数: 48

約数和(自身を含む): 58843008

約数和(自身を除く): 40454988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 43781, 87562, 131343, 175124, 218905, 262686, 306467, 437810, 525372, 612934, 656715, 875620, 919401, 1225868, 1313430, 1532335, 1838802, 2626860, 3064670, 3677604, 4597005, 6129340, 9194010, 18388020]

約数ペア:

[(1, 18388020), (2, 9194010), (3, 6129340), (4, 4597005), (5, 3677604), (6, 3064670), (7, 2626860), (10, 1838802), (12, 1532335), (14, 1313430), (15, 1225868), (20, 919401), (21, 875620), (28, 656715), (30, 612934), (35, 525372), (42, 437810), (60, 306467), (70, 262686), (84, 218905), (105, 175124), (140, 131343), (210, 87562), (420, 43781)]