2499980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{2551}}^1$

素因数の和:2574

約数の個数: 36

約数和(自身を含む): 6109488

約数和(自身を除く): 3609508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 2551, 5102, 10204, 12755, 17857, 25510, 35714, 51020, 71428, 89285, 124999, 178570, 249998, 357140, 499996, 624995, 1249990, 2499980]

約数ペア:

[(1, 2499980), (2, 1249990), (4, 624995), (5, 499996), (7, 357140), (10, 249998), (14, 178570), (20, 124999), (28, 89285), (35, 71428), (49, 51020), (70, 35714), (98, 25510), (140, 17857), (196, 12755), (245, 10204), (490, 5102), (980, 2551)]