128991640

素因数分解:

$2^3\times 5^1\times {\mathrm{3224791}}^1$

素因数の和:3224802

約数の個数: 16

約数和(自身を含む): 290231280

約数和(自身を除く): 161239640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3224791, 6449582, 12899164, 16123955, 25798328, 32247910, 64495820, 128991640]

約数ペア:

[(1, 128991640), (2, 64495820), (4, 32247910), (5, 25798328), (8, 16123955), (10, 12899164), (20, 6449582), (40, 3224791)]