19399880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11279}}^1$

素因数の和:11333

約数の個数: 32

約数和(自身を含む): 44668800

約数和(自身を除く): 25268920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11279, 22558, 45116, 56395, 90232, 112790, 225580, 451160, 484997, 969994, 1939988, 2424985, 3879976, 4849970, 9699940, 19399880]

約数ペア:

[(1, 19399880), (2, 9699940), (4, 4849970), (5, 3879976), (8, 2424985), (10, 1939988), (20, 969994), (40, 484997), (43, 451160), (86, 225580), (172, 112790), (215, 90232), (344, 56395), (430, 45116), (860, 22558), (1720, 11279)]