81400815

素因数分解:

$3^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1399}}^1$

素因数の和:1844

約数の個数: 32

約数和(自身を含む): 145152000

約数和(自身を除く): 63751185

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 431, 1293, 1399, 2155, 3879, 4197, 6465, 6995, 11637, 12591, 19395, 20985, 37773, 58185, 62955, 188865, 602969, 1808907, 3014845, 5426721, 9044535, 16280163, 27133605, 81400815]

約数ペア:

[(1, 81400815), (3, 27133605), (5, 16280163), (9, 9044535), (15, 5426721), (27, 3014845), (45, 1808907), (135, 602969), (431, 188865), (1293, 62955), (1399, 58185), (2155, 37773), (3879, 20985), (4197, 19395), (6465, 12591), (6995, 11637)]