100900000

素因数分解:

$2^5\times 5^5\times {\mathrm{1009}}^1$

素因数の和:1044

約数の個数: 72

約数和(自身を含む): 248538780

約数和(自身を除く): 147638780

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, 1009, 1250, 2000, 2018, 2500, 3125, 4000, 4036, 5000, 5045, 6250, 8072, 10000, 10090, 12500, 16144, 20000, 20180, 25000, 25225, 32288, 40360, 50000, 50450, 80720, 100000, 100900, 126125, 161440, 201800, 252250, 403600, 504500, 630625, 807200, 1009000, 1261250, 2018000, 2522500, 3153125, 4036000, 5045000, 6306250, 10090000, 12612500, 20180000, 25225000, 50450000, 100900000]

約数ペア:

[(1, 100900000), (2, 50450000), (4, 25225000), (5, 20180000), (8, 12612500), (10, 10090000), (16, 6306250), (20, 5045000), (25, 4036000), (32, 3153125), (40, 2522500), (50, 2018000), (80, 1261250), (100, 1009000), (125, 807200), (160, 630625), (200, 504500), (250, 403600), (400, 252250), (500, 201800), (625, 161440), (800, 126125), (1000, 100900), (1009, 100000), (1250, 80720), (2000, 50450), (2018, 50000), (2500, 40360), (3125, 32288), (4000, 25225), (4036, 25000), (5000, 20180), (5045, 20000), (6250, 16144), (8072, 12500), (10000, 10090)]