19978020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{110989}}^1$

素因数の和:111004

約数の個数: 36

約数和(自身を含む): 60600540

約数和(自身を除く): 40622520

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 110989, 221978, 332967, 443956, 554945, 665934, 998901, 1109890, 1331868, 1664835, 1997802, 2219780, 3329670, 3995604, 4994505, 6659340, 9989010, 19978020]

約数ペア:

[(1, 19978020), (2, 9989010), (3, 6659340), (4, 4994505), (5, 3995604), (6, 3329670), (9, 2219780), (10, 1997802), (12, 1664835), (15, 1331868), (18, 1109890), (20, 998901), (30, 665934), (36, 554945), (45, 443956), (60, 332967), (90, 221978), (180, 110989)]