20499856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1471}}^1$

素因数の和:1559

約数の個数: 40

約数和(自身を含む): 43441664

約数和(自身を除く): 22941808

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1471, 1742, 2942, 3484, 5884, 6968, 11768, 13936, 19123, 23536, 38246, 76492, 98557, 152984, 197114, 305968, 394228, 788456, 1281241, 1576912, 2562482, 5124964, 10249928, 20499856]

約数ペア:

[(1, 20499856), (2, 10249928), (4, 5124964), (8, 2562482), (13, 1576912), (16, 1281241), (26, 788456), (52, 394228), (67, 305968), (104, 197114), (134, 152984), (208, 98557), (268, 76492), (536, 38246), (871, 23536), (1072, 19123), (1471, 13936), (1742, 11768), (2942, 6968), (3484, 5884)]