16664260

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 36288000

約数和(自身を除く): 19623740

約数列:

[1, 2, 4, 5, 10, 20, 53, 79, 106, 158, 199, 212, 265, 316, 395, 398, 530, 790, 796, 995, 1060, 1580, 1990, 3980, 4187, 8374, 10547, 15721, 16748, 20935, 21094, 31442, 41870, 42188, 52735, 62884, 78605, 83740, 105470, 157210, 210940, 314420, 833213, 1666426, 3332852, 4166065, 8332130, 16664260]

約数ペア:

[(1, 16664260), (2, 8332130), (4, 4166065), (5, 3332852), (10, 1666426), (20, 833213), (53, 314420), (79, 210940), (106, 157210), (158, 105470), (199, 83740), (212, 78605), (265, 62884), (316, 52735), (395, 42188), (398, 41870), (530, 31442), (790, 21094), (796, 20935), (995, 16748), (1060, 15721), (1580, 10547), (1990, 8374), (3980, 4187)]