21055265

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{3217}}^1$

素因数の和:3257

約数の個数: 32

約数和(自身を含む): 33364224

約数和(自身を除く): 12308959

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 187, 385, 595, 935, 1309, 3217, 6545, 16085, 22519, 35387, 54689, 112595, 176935, 247709, 273445, 382823, 601579, 1238545, 1914115, 3007895, 4211053, 21055265]

約数ペア:

[(1, 21055265), (5, 4211053), (7, 3007895), (11, 1914115), (17, 1238545), (35, 601579), (55, 382823), (77, 273445), (85, 247709), (119, 176935), (187, 112595), (385, 54689), (595, 35387), (935, 22519), (1309, 16085), (3217, 6545)]