204400400

素因数分解:

$2^4\times 5^2\times {\mathrm{511001}}^1$

素因数の和:511019

約数の個数: 30

約数和(自身を含む): 491072922

約数和(自身を除く): 286672522

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 511001, 1022002, 2044004, 2555005, 4088008, 5110010, 8176016, 10220020, 12775025, 20440040, 25550050, 40880080, 51100100, 102200200, 204400400]

約数ペア:

[(1, 204400400), (2, 102200200), (4, 51100100), (5, 40880080), (8, 25550050), (10, 20440040), (16, 12775025), (20, 10220020), (25, 8176016), (40, 5110010), (50, 4088008), (80, 2555005), (100, 2044004), (200, 1022002), (400, 511001)]