18818457

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 29958144

約数和(自身を除く): 11139687

約数列:

[1, 3, 7, 21, 31, 93, 137, 211, 217, 411, 633, 651, 959, 1477, 2877, 4247, 4431, 6541, 12741, 19623, 28907, 29729, 45787, 86721, 89187, 137361, 202349, 607047, 896117, 2688351, 6272819, 18818457]

約数ペア:

[(1, 18818457), (3, 6272819), (7, 2688351), (21, 896117), (31, 607047), (93, 202349), (137, 137361), (211, 89187), (217, 86721), (411, 45787), (633, 29729), (651, 28907), (959, 19623), (1477, 12741), (2877, 6541), (4247, 4431)]