21448220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{317}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 48081600

約数和(自身を除く): 26633380

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 199, 317, 340, 398, 634, 796, 995, 1268, 1585, 1990, 3170, 3383, 3980, 5389, 6340, 6766, 10778, 13532, 16915, 21556, 26945, 33830, 53890, 63083, 67660, 107780, 126166, 252332, 315415, 630830, 1072411, 1261660, 2144822, 4289644, 5362055, 10724110, 21448220]

約数ペア:

[(1, 21448220), (2, 10724110), (4, 5362055), (5, 4289644), (10, 2144822), (17, 1261660), (20, 1072411), (34, 630830), (68, 315415), (85, 252332), (170, 126166), (199, 107780), (317, 67660), (340, 63083), (398, 53890), (634, 33830), (796, 26945), (995, 21556), (1268, 16915), (1585, 13532), (1990, 10778), (3170, 6766), (3383, 6340), (3980, 5389)]