81323480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290441}}^1$

素因数の和:290459

約数の個数: 32

約数和(自身を含む): 209118240

約数和(自身を除く): 127794760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290441, 580882, 1161764, 1452205, 2033087, 2323528, 2904410, 4066174, 5808820, 8132348, 10165435, 11617640, 16264696, 20330870, 40661740, 81323480]

約数ペア:

[(1, 81323480), (2, 40661740), (4, 20330870), (5, 16264696), (7, 11617640), (8, 10165435), (10, 8132348), (14, 5808820), (20, 4066174), (28, 2904410), (35, 2323528), (40, 2033087), (56, 1452205), (70, 1161764), (140, 580882), (280, 290441)]