21051040

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3209}}^1$

素因数の和:3265

約数の個数: 48

約数和(自身を含む): 50961960

約数和(自身を除く): 29910920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3209, 3280, 6418, 6560, 12836, 16045, 25672, 32090, 51344, 64180, 102688, 128360, 131569, 256720, 263138, 513440, 526276, 657845, 1052552, 1315690, 2105104, 2631380, 4210208, 5262760, 10525520, 21051040]

約数ペア:

[(1, 21051040), (2, 10525520), (4, 5262760), (5, 4210208), (8, 2631380), (10, 2105104), (16, 1315690), (20, 1052552), (32, 657845), (40, 526276), (41, 513440), (80, 263138), (82, 256720), (160, 131569), (164, 128360), (205, 102688), (328, 64180), (410, 51344), (656, 32090), (820, 25672), (1312, 16045), (1640, 12836), (3209, 6560), (3280, 6418)]