21121705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{283}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 29445120

約数和(自身を除く): 8323415

約数列:

[1, 5, 11, 23, 55, 59, 115, 253, 283, 295, 649, 1265, 1357, 1415, 3113, 3245, 6509, 6785, 14927, 15565, 16697, 32545, 71599, 74635, 83485, 183667, 357995, 384031, 918335, 1920155, 4224341, 21121705]

約数ペア:

[(1, 21121705), (5, 4224341), (11, 1920155), (23, 918335), (55, 384031), (59, 357995), (115, 183667), (253, 83485), (283, 74635), (295, 71599), (649, 32545), (1265, 16697), (1357, 15565), (1415, 14927), (3113, 6785), (3245, 6509)]