20771620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{307}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25797980

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 199, 307, 340, 398, 614, 796, 995, 1228, 1535, 1990, 3070, 3383, 3980, 5219, 6140, 6766, 10438, 13532, 16915, 20876, 26095, 33830, 52190, 61093, 67660, 104380, 122186, 244372, 305465, 610930, 1038581, 1221860, 2077162, 4154324, 5192905, 10385810, 20771620]

約数ペア:

[(1, 20771620), (2, 10385810), (4, 5192905), (5, 4154324), (10, 2077162), (17, 1221860), (20, 1038581), (34, 610930), (68, 305465), (85, 244372), (170, 122186), (199, 104380), (307, 67660), (340, 61093), (398, 52190), (614, 33830), (796, 26095), (995, 20876), (1228, 16915), (1535, 13532), (1990, 10438), (3070, 6766), (3383, 6140), (3980, 5219)]