21040270

素因数分解:

$2^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:412

約数の個数: 32

約数和(自身を含む): 38808000

約数和(自身を除く): 17767730

約数列:

[1, 2, 5, 10, 97, 109, 194, 199, 218, 398, 485, 545, 970, 995, 1090, 1990, 10573, 19303, 21146, 21691, 38606, 43382, 52865, 96515, 105730, 108455, 193030, 216910, 2104027, 4208054, 10520135, 21040270]

約数ペア:

[(1, 21040270), (2, 10520135), (5, 4208054), (10, 2104027), (97, 216910), (109, 193030), (194, 108455), (199, 105730), (218, 96515), (398, 52865), (485, 43382), (545, 38606), (970, 21691), (995, 21146), (1090, 19303), (1990, 10573)]