18707728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1697}}^1$

素因数の和:1771

約数の個数: 40

約数和(自身を含む): 39794328

約数和(自身を除く): 21086600

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1697, 2756, 3394, 5512, 6788, 11024, 13576, 22061, 27152, 44122, 88244, 89941, 176488, 179882, 352976, 359764, 719528, 1169233, 1439056, 2338466, 4676932, 9353864, 18707728]

約数ペア:

[(1, 18707728), (2, 9353864), (4, 4676932), (8, 2338466), (13, 1439056), (16, 1169233), (26, 719528), (52, 359764), (53, 352976), (104, 179882), (106, 176488), (208, 89941), (212, 88244), (424, 44122), (689, 27152), (848, 22061), (1378, 13576), (1697, 11024), (2756, 6788), (3394, 5512)]