200420780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{204511}}^1$

素因数の和:204534

約数の個数: 36

約数和(自身を含む): 489601728

約数和(自身を除く): 289180948

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 204511, 409022, 818044, 1022555, 1431577, 2045110, 2863154, 4090220, 5726308, 7157885, 10021039, 14315770, 20042078, 28631540, 40084156, 50105195, 100210390, 200420780]

約数ペア:

[(1, 200420780), (2, 100210390), (4, 50105195), (5, 40084156), (7, 28631540), (10, 20042078), (14, 14315770), (20, 10021039), (28, 7157885), (35, 5726308), (49, 4090220), (70, 2863154), (98, 2045110), (140, 1431577), (196, 1022555), (245, 818044), (490, 409022), (980, 204511)]