20840980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61297}}^1$

素因数の和:61323

約数の個数: 24

約数和(自身を含む): 46341288

約数和(自身を除く): 25500308

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61297, 122594, 245188, 306485, 612970, 1042049, 1225940, 2084098, 4168196, 5210245, 10420490, 20840980]

約数ペア:

[(1, 20840980), (2, 10420490), (4, 5210245), (5, 4168196), (10, 2084098), (17, 1225940), (20, 1042049), (34, 612970), (68, 306485), (85, 245188), (170, 122594), (340, 61297)]