21720688

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{739}}^1$

素因数の和:925

約数の個数: 40

約数和(自身を含む): 46247040

約数和(自身を除く): 24526352

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 167, 176, 334, 668, 739, 1336, 1478, 1837, 2672, 2956, 3674, 5912, 7348, 8129, 11824, 14696, 16258, 29392, 32516, 65032, 123413, 130064, 246826, 493652, 987304, 1357543, 1974608, 2715086, 5430172, 10860344, 21720688]

約数ペア:

[(1, 21720688), (2, 10860344), (4, 5430172), (8, 2715086), (11, 1974608), (16, 1357543), (22, 987304), (44, 493652), (88, 246826), (167, 130064), (176, 123413), (334, 65032), (668, 32516), (739, 29392), (1336, 16258), (1478, 14696), (1837, 11824), (2672, 8129), (2956, 7348), (3674, 5912)]