81568968

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{261439}}^1$

素因数の和:261461

約数の個数: 32

約数和(自身を含む): 219609600

約数和(自身を除く): 138040632

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312, 261439, 522878, 784317, 1045756, 1568634, 2091512, 3137268, 3398707, 6274536, 6797414, 10196121, 13594828, 20392242, 27189656, 40784484, 81568968]

約数ペア:

[(1, 81568968), (2, 40784484), (3, 27189656), (4, 20392242), (6, 13594828), (8, 10196121), (12, 6797414), (13, 6274536), (24, 3398707), (26, 3137268), (39, 2091512), (52, 1568634), (78, 1045756), (104, 784317), (156, 522878), (312, 261439)]