20541872

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1619}}^1$

素因数の和:1701

約数の個数: 40

約数和(自身を含む): 43590960

約数和(自身を除く): 23049088

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 122, 208, 244, 488, 793, 976, 1586, 1619, 3172, 3238, 6344, 6476, 12688, 12952, 21047, 25904, 42094, 84188, 98759, 168376, 197518, 336752, 395036, 790072, 1283867, 1580144, 2567734, 5135468, 10270936, 20541872]

約数ペア:

[(1, 20541872), (2, 10270936), (4, 5135468), (8, 2567734), (13, 1580144), (16, 1283867), (26, 790072), (52, 395036), (61, 336752), (104, 197518), (122, 168376), (208, 98759), (244, 84188), (488, 42094), (793, 25904), (976, 21047), (1586, 12952), (1619, 12688), (3172, 6476), (3238, 6344)]