19959020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1249}}^1$

素因数の和:1322

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 25400980

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 85, 94, 170, 188, 235, 340, 470, 799, 940, 1249, 1598, 2498, 3196, 3995, 4996, 6245, 7990, 12490, 15980, 21233, 24980, 42466, 58703, 84932, 106165, 117406, 212330, 234812, 293515, 424660, 587030, 997951, 1174060, 1995902, 3991804, 4989755, 9979510, 19959020]

約数ペア:

[(1, 19959020), (2, 9979510), (4, 4989755), (5, 3991804), (10, 1995902), (17, 1174060), (20, 997951), (34, 587030), (47, 424660), (68, 293515), (85, 234812), (94, 212330), (170, 117406), (188, 106165), (235, 84932), (340, 58703), (470, 42466), (799, 24980), (940, 21233), (1249, 15980), (1598, 12490), (2498, 7990), (3196, 6245), (3995, 4996)]