81986905

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{16381}}^1$

素因数の和:16417

約数の個数: 32

約数和(自身を含む): 132104448

約数和(自身を除く): 50117543

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 5005, 16381, 81905, 114667, 180191, 212953, 573335, 900955, 1064765, 1261337, 1490671, 2342483, 6306685, 7453355, 11712415, 16397381, 81986905]

約数ペア:

[(1, 81986905), (5, 16397381), (7, 11712415), (11, 7453355), (13, 6306685), (35, 2342483), (55, 1490671), (65, 1261337), (77, 1064765), (91, 900955), (143, 573335), (385, 212953), (455, 180191), (715, 114667), (1001, 81905), (5005, 16381)]