65680000

素因数分解:

$2^7\times 5^4\times {\mathrm{821}}^1$

素因数の和:855

約数の個数: 80

約数和(自身を含む): 163705410

約数和(自身を除く): 98025410

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 625, 640, 800, 821, 1000, 1250, 1600, 1642, 2000, 2500, 3200, 3284, 4000, 4105, 5000, 6568, 8000, 8210, 10000, 13136, 16000, 16420, 20000, 20525, 26272, 32840, 40000, 41050, 52544, 65680, 80000, 82100, 102625, 105088, 131360, 164200, 205250, 262720, 328400, 410500, 513125, 525440, 656800, 821000, 1026250, 1313600, 1642000, 2052500, 2627200, 3284000, 4105000, 6568000, 8210000, 13136000, 16420000, 32840000, 65680000]

約数ペア:

[(1, 65680000), (2, 32840000), (4, 16420000), (5, 13136000), (8, 8210000), (10, 6568000), (16, 4105000), (20, 3284000), (25, 2627200), (32, 2052500), (40, 1642000), (50, 1313600), (64, 1026250), (80, 821000), (100, 656800), (125, 525440), (128, 513125), (160, 410500), (200, 328400), (250, 262720), (320, 205250), (400, 164200), (500, 131360), (625, 105088), (640, 102625), (800, 82100), (821, 80000), (1000, 65680), (1250, 52544), (1600, 41050), (1642, 40000), (2000, 32840), (2500, 26272), (3200, 20525), (3284, 20000), (4000, 16420), (4105, 16000), (5000, 13136), (6568, 10000), (8000, 8210)]