21101818

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{7607}}^1$

素因数の和:7701

約数の個数: 16

約数和(自身を含む): 33779520

約数和(自身を除く): 12677702

約数列:

[1, 2, 19, 38, 73, 146, 1387, 2774, 7607, 15214, 144533, 289066, 555311, 1110622, 10550909, 21101818]

約数ペア:

[(1, 21101818), (2, 10550909), (19, 1110622), (38, 555311), (73, 289066), (146, 144533), (1387, 15214), (2774, 7607)]