21059720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2081}}^1$

素因数の和:2126

約数の個数: 64

約数和(自身を含む): 53965440

約数和(自身を除く): 32905720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 184, 220, 230, 253, 440, 460, 506, 920, 1012, 1265, 2024, 2081, 2530, 4162, 5060, 8324, 10120, 10405, 16648, 20810, 22891, 41620, 45782, 47863, 83240, 91564, 95726, 114455, 183128, 191452, 228910, 239315, 382904, 457820, 478630, 526493, 915640, 957260, 1052986, 1914520, 2105972, 2632465, 4211944, 5264930, 10529860, 21059720]

約数ペア:

[(1, 21059720), (2, 10529860), (4, 5264930), (5, 4211944), (8, 2632465), (10, 2105972), (11, 1914520), (20, 1052986), (22, 957260), (23, 915640), (40, 526493), (44, 478630), (46, 457820), (55, 382904), (88, 239315), (92, 228910), (110, 191452), (115, 183128), (184, 114455), (220, 95726), (230, 91564), (253, 83240), (440, 47863), (460, 45782), (506, 41620), (920, 22891), (1012, 20810), (1265, 16648), (2024, 10405), (2081, 10120), (2530, 8324), (4162, 5060)]