28198580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{421}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 63168336

約数和(自身を除く): 34969756

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 197, 340, 394, 421, 788, 842, 985, 1684, 1970, 2105, 3349, 3940, 4210, 6698, 7157, 8420, 13396, 14314, 16745, 28628, 33490, 35785, 66980, 71570, 82937, 143140, 165874, 331748, 414685, 829370, 1409929, 1658740, 2819858, 5639716, 7049645, 14099290, 28198580]

約数ペア:

[(1, 28198580), (2, 14099290), (4, 7049645), (5, 5639716), (10, 2819858), (17, 1658740), (20, 1409929), (34, 829370), (68, 414685), (85, 331748), (170, 165874), (197, 143140), (340, 82937), (394, 71570), (421, 66980), (788, 35785), (842, 33490), (985, 28628), (1684, 16745), (1970, 14314), (2105, 13396), (3349, 8420), (3940, 7157), (4210, 6698)]