18120980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 22521580

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 223, 239, 340, 446, 478, 892, 956, 1115, 1195, 2230, 2390, 3791, 4063, 4460, 4780, 7582, 8126, 15164, 16252, 18955, 20315, 37910, 40630, 53297, 75820, 81260, 106594, 213188, 266485, 532970, 906049, 1065940, 1812098, 3624196, 4530245, 9060490, 18120980]

約数ペア:

[(1, 18120980), (2, 9060490), (4, 4530245), (5, 3624196), (10, 1812098), (17, 1065940), (20, 906049), (34, 532970), (68, 266485), (85, 213188), (170, 106594), (223, 81260), (239, 75820), (340, 53297), (446, 40630), (478, 37910), (892, 20315), (956, 18955), (1115, 16252), (1195, 15164), (2230, 8126), (2390, 7582), (3791, 4780), (4063, 4460)]