20394780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3\times {\mathrm{991}}^1$

素因数の和:1024

約数の個数: 96

約数和(自身を含む): 66662400

約数和(自身を除く): 46267620

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 343, 420, 490, 588, 686, 735, 980, 991, 1029, 1372, 1470, 1715, 1982, 2058, 2940, 2973, 3430, 3964, 4116, 4955, 5145, 5946, 6860, 6937, 9910, 10290, 11892, 13874, 14865, 19820, 20580, 20811, 27748, 29730, 34685, 41622, 48559, 59460, 69370, 83244, 97118, 104055, 138740, 145677, 194236, 208110, 242795, 291354, 339913, 416220, 485590, 582708, 679826, 728385, 971180, 1019739, 1359652, 1456770, 1699565, 2039478, 2913540, 3399130, 4078956, 5098695, 6798260, 10197390, 20394780]

約数ペア:

[(1, 20394780), (2, 10197390), (3, 6798260), (4, 5098695), (5, 4078956), (6, 3399130), (7, 2913540), (10, 2039478), (12, 1699565), (14, 1456770), (15, 1359652), (20, 1019739), (21, 971180), (28, 728385), (30, 679826), (35, 582708), (42, 485590), (49, 416220), (60, 339913), (70, 291354), (84, 242795), (98, 208110), (105, 194236), (140, 145677), (147, 138740), (196, 104055), (210, 97118), (245, 83244), (294, 69370), (343, 59460), (420, 48559), (490, 41622), (588, 34685), (686, 29730), (735, 27748), (980, 20811), (991, 20580), (1029, 19820), (1372, 14865), (1470, 13874), (1715, 11892), (1982, 10290), (2058, 9910), (2940, 6937), (2973, 6860), (3430, 5946), (3964, 5145), (4116, 4955)]