64502500

素因数分解:

$2^2\times 5^4\times {\mathrm{25801}}^1$

素因数の和:25825

約数の個数: 30

約数和(自身を含む): 141059534

約数和(自身を除く): 76557034

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 25801, 51602, 103204, 129005, 258010, 516020, 645025, 1290050, 2580100, 3225125, 6450250, 12900500, 16125625, 32251250, 64502500]

約数ペア:

[(1, 64502500), (2, 32251250), (4, 16125625), (5, 12900500), (10, 6450250), (20, 3225125), (25, 2580100), (50, 1290050), (100, 645025), (125, 516020), (250, 258010), (500, 129005), (625, 103204), (1250, 51602), (2500, 25801)]