81301563

素因数分解:

$3^4\times 7^1\times {\mathrm{223}}^1\times {\mathrm{643}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 139639808

約数和(自身を除く): 58338245

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 223, 567, 643, 669, 1561, 1929, 2007, 4501, 4683, 5787, 6021, 13503, 14049, 17361, 18063, 40509, 42147, 52083, 121527, 126441, 143389, 364581, 430167, 1003723, 1290501, 3011169, 3871503, 9033507, 11614509, 27100521, 81301563]

約数ペア:

[(1, 81301563), (3, 27100521), (7, 11614509), (9, 9033507), (21, 3871503), (27, 3011169), (63, 1290501), (81, 1003723), (189, 430167), (223, 364581), (567, 143389), (643, 126441), (669, 121527), (1561, 52083), (1929, 42147), (2007, 40509), (4501, 18063), (4683, 17361), (5787, 14049), (6021, 13503)]