21356665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 8503175

約数列:

[1, 5, 11, 19, 55, 95, 107, 191, 209, 535, 955, 1045, 1177, 2033, 2101, 3629, 5885, 10165, 10505, 18145, 20437, 22363, 39919, 102185, 111815, 199595, 224807, 388303, 1124035, 1941515, 4271333, 21356665]

約数ペア:

[(1, 21356665), (5, 4271333), (11, 1941515), (19, 1124035), (55, 388303), (95, 224807), (107, 199595), (191, 111815), (209, 102185), (535, 39919), (955, 22363), (1045, 20437), (1177, 18145), (2033, 10505), (2101, 10165), (3629, 5885)]