81020000

素因数分解:

$2^5\times 5^4\times {\mathrm{4051}}^1$

素因数の和:4081

約数の個数: 60

約数和(自身を含む): 199370556

約数和(自身を除く): 118350556

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 2000, 2500, 4000, 4051, 5000, 8102, 10000, 16204, 20000, 20255, 32408, 40510, 64816, 81020, 101275, 129632, 162040, 202550, 324080, 405100, 506375, 648160, 810200, 1012750, 1620400, 2025500, 2531875, 3240800, 4051000, 5063750, 8102000, 10127500, 16204000, 20255000, 40510000, 81020000]

約数ペア:

[(1, 81020000), (2, 40510000), (4, 20255000), (5, 16204000), (8, 10127500), (10, 8102000), (16, 5063750), (20, 4051000), (25, 3240800), (32, 2531875), (40, 2025500), (50, 1620400), (80, 1012750), (100, 810200), (125, 648160), (160, 506375), (200, 405100), (250, 324080), (400, 202550), (500, 162040), (625, 129632), (800, 101275), (1000, 81020), (1250, 64816), (2000, 40510), (2500, 32408), (4000, 20255), (4051, 20000), (5000, 16204), (8102, 10000)]