81713320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157141}}^1$

素因数の和:157165

約数の個数: 32

約数和(自身を含む): 197998920

約数和(自身を除く): 116285600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157141, 314282, 628564, 785705, 1257128, 1571410, 2042833, 3142820, 4085666, 6285640, 8171332, 10214165, 16342664, 20428330, 40856660, 81713320]

約数ペア:

[(1, 81713320), (2, 40856660), (4, 20428330), (5, 16342664), (8, 10214165), (10, 8171332), (13, 6285640), (20, 4085666), (26, 3142820), (40, 2042833), (52, 1571410), (65, 1257128), (104, 785705), (130, 628564), (260, 314282), (520, 157141)]