21730160

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1823}}^1$

素因数の和:1985

約数の個数: 40

約数和(自身を含む): 50889600

約数和(自身を除く): 29159440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1823, 2384, 2980, 3646, 5960, 7292, 9115, 11920, 14584, 18230, 29168, 36460, 72920, 145840, 271627, 543254, 1086508, 1358135, 2173016, 2716270, 4346032, 5432540, 10865080, 21730160]

約数ペア:

[(1, 21730160), (2, 10865080), (4, 5432540), (5, 4346032), (8, 2716270), (10, 2173016), (16, 1358135), (20, 1086508), (40, 543254), (80, 271627), (149, 145840), (298, 72920), (596, 36460), (745, 29168), (1192, 18230), (1490, 14584), (1823, 11920), (2384, 9115), (2980, 7292), (3646, 5960)]