20988786

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{2957}}^1$

素因数の和:2995

約数の個数: 48

約数和(自身を含む): 51966144

約数和(自身を除く): 30977358

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 78, 91, 169, 182, 273, 338, 507, 546, 1014, 1183, 2366, 2957, 3549, 5914, 7098, 8871, 17742, 20699, 38441, 41398, 62097, 76882, 115323, 124194, 230646, 269087, 499733, 538174, 807261, 999466, 1499199, 1614522, 2998398, 3498131, 6996262, 10494393, 20988786]

約数ペア:

[(1, 20988786), (2, 10494393), (3, 6996262), (6, 3498131), (7, 2998398), (13, 1614522), (14, 1499199), (21, 999466), (26, 807261), (39, 538174), (42, 499733), (78, 269087), (91, 230646), (169, 124194), (182, 115323), (273, 76882), (338, 62097), (507, 41398), (546, 38441), (1014, 20699), (1183, 17742), (2366, 8871), (2957, 7098), (3549, 5914)]