8980100

素因数分解:

$2^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{1009}}^1$

素因数の和:1112

約数の個数: 36

約数和(自身を含む): 19725300

約数和(自身を除く): 10745200

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 178, 356, 445, 890, 1009, 1780, 2018, 2225, 4036, 4450, 5045, 8900, 10090, 20180, 25225, 50450, 89801, 100900, 179602, 359204, 449005, 898010, 1796020, 2245025, 4490050, 8980100]

約数ペア:

[(1, 8980100), (2, 4490050), (4, 2245025), (5, 1796020), (10, 898010), (20, 449005), (25, 359204), (50, 179602), (89, 100900), (100, 89801), (178, 50450), (356, 25225), (445, 20180), (890, 10090), (1009, 8900), (1780, 5045), (2018, 4450), (2225, 4036)]