13687220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 30576000

約数和(自身を除く): 16888780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 181, 190, 199, 362, 380, 398, 724, 796, 905, 995, 1810, 1990, 3439, 3620, 3781, 3980, 6878, 7562, 13756, 15124, 17195, 18905, 34390, 36019, 37810, 68780, 72038, 75620, 144076, 180095, 360190, 684361, 720380, 1368722, 2737444, 3421805, 6843610, 13687220]

約数ペア:

[(1, 13687220), (2, 6843610), (4, 3421805), (5, 2737444), (10, 1368722), (19, 720380), (20, 684361), (38, 360190), (76, 180095), (95, 144076), (181, 75620), (190, 72038), (199, 68780), (362, 37810), (380, 36019), (398, 34390), (724, 18905), (796, 17195), (905, 15124), (995, 13756), (1810, 7562), (1990, 6878), (3439, 3980), (3620, 3781)]