81278813

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{17891}}^1$

素因数の和:17968

約数の個数: 16

約数和(自身を含む): 103057920

約数和(自身を除く): 21779107

約数列:

[1, 7, 11, 59, 77, 413, 649, 4543, 17891, 125237, 196801, 1055569, 1377607, 7388983, 11611259, 81278813]

約数ペア:

[(1, 81278813), (7, 11611259), (11, 7388983), (59, 1377607), (77, 1055569), (413, 196801), (649, 125237), (4543, 17891)]