21411728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{331}}^1$

素因数の和:663

約数の個数: 40

約数和(自身を含む): 44955456

約数和(自身を除く): 23543728

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 311, 331, 622, 662, 1244, 1324, 2488, 2648, 4043, 4303, 4976, 5296, 8086, 8606, 16172, 17212, 32344, 34424, 64688, 68848, 102941, 205882, 411764, 823528, 1338233, 1647056, 2676466, 5352932, 10705864, 21411728]

約数ペア:

[(1, 21411728), (2, 10705864), (4, 5352932), (8, 2676466), (13, 1647056), (16, 1338233), (26, 823528), (52, 411764), (104, 205882), (208, 102941), (311, 68848), (331, 64688), (622, 34424), (662, 32344), (1244, 17212), (1324, 16172), (2488, 8606), (2648, 8086), (4043, 5296), (4303, 4976)]