66980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 149688

約数和(自身を除く): 82708

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 197, 340, 394, 788, 985, 1970, 3349, 3940, 6698, 13396, 16745, 33490, 66980]

約数ペア:

[(1, 66980), (2, 33490), (4, 16745), (5, 13396), (10, 6698), (17, 3940), (20, 3349), (34, 1970), (68, 985), (85, 788), (170, 394), (197, 340)]