18912985

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{211}}^1$

素因数の和:433

約数の個数: 32

約数和(自身を含む): 28207872

約数和(自身を除く): 9294887

約数列:

[1, 5, 7, 13, 35, 65, 91, 197, 211, 455, 985, 1055, 1379, 1477, 2561, 2743, 6895, 7385, 12805, 13715, 17927, 19201, 41567, 89635, 96005, 207835, 290969, 540371, 1454845, 2701855, 3782597, 18912985]

約数ペア:

[(1, 18912985), (5, 3782597), (7, 2701855), (13, 1454845), (35, 540371), (65, 290969), (91, 207835), (197, 96005), (211, 89635), (455, 41567), (985, 19201), (1055, 17927), (1379, 13715), (1477, 12805), (2561, 7385), (2743, 6895)]