81273712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390739}}^1$

素因数の和:390760

約数の個数: 20

約数和(自身を含む): 169581160

約数和(自身を除く): 88307448

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390739, 781478, 1562956, 3125912, 5079607, 6251824, 10159214, 20318428, 40636856, 81273712]

約数ペア:

[(1, 81273712), (2, 40636856), (4, 20318428), (8, 10159214), (13, 6251824), (16, 5079607), (26, 3125912), (52, 1562956), (104, 781478), (208, 390739)]