81947551

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 108345600

約数和(自身を除く): 26398049

約数列:

[1, 7, 19, 23, 43, 49, 89, 133, 161, 301, 437, 623, 817, 931, 989, 1127, 1691, 2047, 2107, 3059, 3827, 4361, 5719, 6923, 11837, 14329, 18791, 21413, 26789, 38893, 40033, 48461, 72713, 82859, 88021, 100303, 131537, 187523, 272251, 508991, 616147, 920759, 1672399, 1905757, 3562937, 4313029, 11706793, 81947551]

約数ペア:

[(1, 81947551), (7, 11706793), (19, 4313029), (23, 3562937), (43, 1905757), (49, 1672399), (89, 920759), (133, 616147), (161, 508991), (301, 272251), (437, 187523), (623, 131537), (817, 100303), (931, 88021), (989, 82859), (1127, 72713), (1691, 48461), (2047, 40033), (2107, 38893), (3059, 26789), (3827, 21413), (4361, 18791), (5719, 14329), (6923, 11837)]