81905000

素因数分解:

$2^3\times 5^4\times {\mathrm{16381}}^1$

素因数の和:16407

約数の個数: 40

約数和(自身を含む): 191915130

約数和(自身を除く): 110010130

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 5000, 16381, 32762, 65524, 81905, 131048, 163810, 327620, 409525, 655240, 819050, 1638100, 2047625, 3276200, 4095250, 8190500, 10238125, 16381000, 20476250, 40952500, 81905000]

約数ペア:

[(1, 81905000), (2, 40952500), (4, 20476250), (5, 16381000), (8, 10238125), (10, 8190500), (20, 4095250), (25, 3276200), (40, 2047625), (50, 1638100), (100, 819050), (125, 655240), (200, 409525), (250, 327620), (500, 163810), (625, 131048), (1000, 81905), (1250, 65524), (2500, 32762), (5000, 16381)]