81780280

素因数分解:

$2^3\times 5^1\times {\mathrm{2044507}}^1$

素因数の和:2044518

約数の個数: 16

約数和(自身を含む): 184005720

約数和(自身を除く): 102225440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2044507, 4089014, 8178028, 10222535, 16356056, 20445070, 40890140, 81780280]

約数ペア:

[(1, 81780280), (2, 40890140), (4, 20445070), (5, 16356056), (8, 10222535), (10, 8178028), (20, 4089014), (40, 2044507)]