81303664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390883}}^1$

素因数の和:390904

約数の個数: 20

約数和(自身を含む): 169643656

約数和(自身を除く): 88339992

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390883, 781766, 1563532, 3127064, 5081479, 6254128, 10162958, 20325916, 40651832, 81303664]

約数ペア:

[(1, 81303664), (2, 40651832), (4, 20325916), (8, 10162958), (13, 6254128), (16, 5081479), (26, 3127064), (52, 1563532), (104, 781766), (208, 390883)]