21218193

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{811}}^1$

素因数の和:859

約数の個数: 40

約数和(自身を含む): 35370720

約数和(自身を除く): 14152527

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 323, 459, 513, 811, 969, 1377, 1539, 2433, 2907, 7299, 8721, 13787, 15409, 21897, 26163, 41361, 46227, 65691, 124083, 138681, 261953, 372249, 416043, 785859, 1116747, 1248129, 2357577, 7072731, 21218193]

約数ペア:

[(1, 21218193), (3, 7072731), (9, 2357577), (17, 1248129), (19, 1116747), (27, 785859), (51, 416043), (57, 372249), (81, 261953), (153, 138681), (171, 124083), (323, 65691), (459, 46227), (513, 41361), (811, 26163), (969, 21897), (1377, 15409), (1539, 13787), (2433, 8721), (2907, 7299)]