16420000

素因数分解:

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

素因数の和:851

約数の個数: 60

約数和(自身を含む): 40444866

約数和(自身を除く): 24024866

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, 821, 1000, 1250, 1642, 2000, 2500, 3284, 4000, 4105, 5000, 6568, 8210, 10000, 13136, 16420, 20000, 20525, 26272, 32840, 41050, 65680, 82100, 102625, 131360, 164200, 205250, 328400, 410500, 513125, 656800, 821000, 1026250, 1642000, 2052500, 3284000, 4105000, 8210000, 16420000]

約数ペア:

[(1, 16420000), (2, 8210000), (4, 4105000), (5, 3284000), (8, 2052500), (10, 1642000), (16, 1026250), (20, 821000), (25, 656800), (32, 513125), (40, 410500), (50, 328400), (80, 205250), (100, 164200), (125, 131360), (160, 102625), (200, 82100), (250, 65680), (400, 41050), (500, 32840), (625, 26272), (800, 20525), (821, 20000), (1000, 16420), (1250, 13136), (1642, 10000), (2000, 8210), (2500, 6568), (3284, 5000), (4000, 4105)]