81328144

素因数分解:

$2^4\times {\mathrm{281}}^1\times {\mathrm{18089}}^1$

素因数の和:18378

約数の個数: 20

約数和(自身を含む): 158142780

約数和(自身を除く): 76814636

約数列:

[1, 2, 4, 8, 16, 281, 562, 1124, 2248, 4496, 18089, 36178, 72356, 144712, 289424, 5083009, 10166018, 20332036, 40664072, 81328144]

約数ペア:

[(1, 81328144), (2, 40664072), (4, 20332036), (8, 10166018), (16, 5083009), (281, 289424), (562, 144712), (1124, 72356), (2248, 36178), (4496, 18089)]