20571020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3559}}^1$

素因数の和:3602

約数の個数: 36

約数和(自身を含む): 45902640

約数和(自身を除く): 25331620

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3559, 5780, 7118, 14236, 17795, 35590, 60503, 71180, 121006, 242012, 302515, 605030, 1028551, 1210060, 2057102, 4114204, 5142755, 10285510, 20571020]

約数ペア:

[(1, 20571020), (2, 10285510), (4, 5142755), (5, 4114204), (10, 2057102), (17, 1210060), (20, 1028551), (34, 605030), (68, 302515), (85, 242012), (170, 121006), (289, 71180), (340, 60503), (578, 35590), (1156, 17795), (1445, 14236), (2890, 7118), (3559, 5780)]