21813728

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:327

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 22893088

約数列:

[1, 2, 4, 8, 16, 32, 43, 83, 86, 166, 172, 191, 332, 344, 382, 664, 688, 764, 1328, 1376, 1528, 2656, 3056, 3569, 6112, 7138, 8213, 14276, 15853, 16426, 28552, 31706, 32852, 57104, 63412, 65704, 114208, 126824, 131408, 253648, 262816, 507296, 681679, 1363358, 2726716, 5453432, 10906864, 21813728]

約数ペア:

[(1, 21813728), (2, 10906864), (4, 5453432), (8, 2726716), (16, 1363358), (32, 681679), (43, 507296), (83, 262816), (86, 253648), (166, 131408), (172, 126824), (191, 114208), (332, 65704), (344, 63412), (382, 57104), (664, 32852), (688, 31706), (764, 28552), (1328, 16426), (1376, 15853), (1528, 14276), (2656, 8213), (3056, 7138), (3569, 6112)]