510640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1$

素因数の和:517

約数の個数: 40

約数和(自身を含む): 1281168

約数和(自身を除く): 770528

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 491, 520, 982, 1040, 1964, 2455, 3928, 4910, 6383, 7856, 9820, 12766, 19640, 25532, 31915, 39280, 51064, 63830, 102128, 127660, 255320, 510640]

約数ペア:

[(1, 510640), (2, 255320), (4, 127660), (5, 102128), (8, 63830), (10, 51064), (13, 39280), (16, 31915), (20, 25532), (26, 19640), (40, 12766), (52, 9820), (65, 7856), (80, 6383), (104, 4910), (130, 3928), (208, 2455), (260, 1964), (491, 1040), (520, 982)]