80990120

素因数分解:

$2^3\times 5^1\times {\mathrm{1019}}^1\times {\mathrm{1987}}^1$

素因数の和:3017

約数の個数: 32

約数和(自身を含む): 182498400

約数和(自身を除く): 101508280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1019, 1987, 2038, 3974, 4076, 5095, 7948, 8152, 9935, 10190, 15896, 19870, 20380, 39740, 40760, 79480, 2024753, 4049506, 8099012, 10123765, 16198024, 20247530, 40495060, 80990120]

約数ペア:

[(1, 80990120), (2, 40495060), (4, 20247530), (5, 16198024), (8, 10123765), (10, 8099012), (20, 4049506), (40, 2024753), (1019, 79480), (1987, 40760), (2038, 39740), (3974, 20380), (4076, 19870), (5095, 15896), (7948, 10190), (8152, 9935)]