21127816

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{677}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 41005440

約数和(自身を除く): 19877624

約数列:

[1, 2, 4, 8, 47, 83, 94, 166, 188, 332, 376, 664, 677, 1354, 2708, 3901, 5416, 7802, 15604, 31208, 31819, 56191, 63638, 112382, 127276, 224764, 254552, 449528, 2640977, 5281954, 10563908, 21127816]

約数ペア:

[(1, 21127816), (2, 10563908), (4, 5281954), (8, 2640977), (47, 449528), (83, 254552), (94, 224764), (166, 127276), (188, 112382), (332, 63638), (376, 56191), (664, 31819), (677, 31208), (1354, 15604), (2708, 7802), (3901, 5416)]