20640400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4691}}^1$

素因数の和:4720

約数の個数: 60

約数和(自身を含む): 54108144

約数和(自身を除く): 33467744

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4691, 9382, 18764, 23455, 37528, 46910, 51601, 75056, 93820, 103202, 117275, 187640, 206404, 234550, 258005, 375280, 412808, 469100, 516010, 825616, 938200, 1032020, 1290025, 1876400, 2064040, 2580050, 4128080, 5160100, 10320200, 20640400]

約数ペア:

[(1, 20640400), (2, 10320200), (4, 5160100), (5, 4128080), (8, 2580050), (10, 2064040), (11, 1876400), (16, 1290025), (20, 1032020), (22, 938200), (25, 825616), (40, 516010), (44, 469100), (50, 412808), (55, 375280), (80, 258005), (88, 234550), (100, 206404), (110, 187640), (176, 117275), (200, 103202), (220, 93820), (275, 75056), (400, 51601), (440, 46910), (550, 37528), (880, 23455), (1100, 18764), (2200, 9382), (4400, 4691)]