128959400

素因数分解:

$2^3\times 5^2\times {\mathrm{644797}}^1$

素因数の和:644813

約数の個数: 24

約数和(自身を含む): 299831070

約数和(自身を除く): 170871670

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 644797, 1289594, 2579188, 3223985, 5158376, 6447970, 12895940, 16119925, 25791880, 32239850, 64479700, 128959400]

約数ペア:

[(1, 128959400), (2, 64479700), (4, 32239850), (5, 25791880), (8, 16119925), (10, 12895940), (20, 6447970), (25, 5158376), (40, 3223985), (50, 2579188), (100, 1289594), (200, 644797)]