81385857

素因数分解:

$3^3\times 7^1\times {\mathrm{223}}^1\times {\mathrm{1931}}^1$

素因数の和:2170

約数の個数: 32

約数和(自身を含む): 138485760

約数和(自身を除く): 57099903

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 223, 669, 1561, 1931, 2007, 4683, 5793, 6021, 13517, 14049, 17379, 40551, 42147, 52137, 121653, 364959, 430613, 1291839, 3014291, 3875517, 9042873, 11626551, 27128619, 81385857]

約数ペア:

[(1, 81385857), (3, 27128619), (7, 11626551), (9, 9042873), (21, 3875517), (27, 3014291), (63, 1291839), (189, 430613), (223, 364959), (669, 121653), (1561, 52137), (1931, 42147), (2007, 40551), (4683, 17379), (5793, 14049), (6021, 13517)]