20493020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{271}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 45696000

約数和(自身を除く): 25202980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 199, 271, 380, 398, 542, 796, 995, 1084, 1355, 1990, 2710, 3781, 3980, 5149, 5420, 7562, 10298, 15124, 18905, 20596, 25745, 37810, 51490, 53929, 75620, 102980, 107858, 215716, 269645, 539290, 1024651, 1078580, 2049302, 4098604, 5123255, 10246510, 20493020]

約数ペア:

[(1, 20493020), (2, 10246510), (4, 5123255), (5, 4098604), (10, 2049302), (19, 1078580), (20, 1024651), (38, 539290), (76, 269645), (95, 215716), (190, 107858), (199, 102980), (271, 75620), (380, 53929), (398, 51490), (542, 37810), (796, 25745), (995, 20596), (1084, 18905), (1355, 15124), (1990, 10298), (2710, 7562), (3781, 5420), (3980, 5149)]