21018520

素因数分解:

$2^3\times 5^1\times {\mathrm{479}}^1\times {\mathrm{1097}}^1$

素因数の和:1587

約数の個数: 32

約数和(自身を含む): 47433600

約数和(自身を除く): 26415080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 479, 958, 1097, 1916, 2194, 2395, 3832, 4388, 4790, 5485, 8776, 9580, 10970, 19160, 21940, 43880, 525463, 1050926, 2101852, 2627315, 4203704, 5254630, 10509260, 21018520]

約数ペア:

[(1, 21018520), (2, 10509260), (4, 5254630), (5, 4203704), (8, 2627315), (10, 2101852), (20, 1050926), (40, 525463), (479, 43880), (958, 21940), (1097, 19160), (1916, 10970), (2194, 9580), (2395, 8776), (3832, 5485), (4388, 4790)]