28297815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{20731}}^1$

素因数の和:20759

約数の個数: 32

約数和(自身を含む): 55727616

約数和(自身を除く): 27429801

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 20731, 62193, 103655, 145117, 269503, 310965, 435351, 725585, 808509, 1347515, 1886521, 2176755, 4042545, 5659563, 9432605, 28297815]

約数ペア:

[(1, 28297815), (3, 9432605), (5, 5659563), (7, 4042545), (13, 2176755), (15, 1886521), (21, 1347515), (35, 808509), (39, 725585), (65, 435351), (91, 310965), (105, 269503), (195, 145117), (273, 103655), (455, 62193), (1365, 20731)]