21355088

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{353}}^1$

素因数の和:579

約数の個数: 40

約数和(自身を含む): 43896000

約数和(自身を除く): 22540912

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 199, 304, 353, 398, 706, 796, 1412, 1592, 2824, 3184, 3781, 5648, 6707, 7562, 13414, 15124, 26828, 30248, 53656, 60496, 70247, 107312, 140494, 280988, 561976, 1123952, 1334693, 2669386, 5338772, 10677544, 21355088]

約数ペア:

[(1, 21355088), (2, 10677544), (4, 5338772), (8, 2669386), (16, 1334693), (19, 1123952), (38, 561976), (76, 280988), (152, 140494), (199, 107312), (304, 70247), (353, 60496), (398, 53656), (706, 30248), (796, 26828), (1412, 15124), (1592, 13414), (2824, 7562), (3184, 6707), (3781, 5648)]