21493563

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{601}}^1$

素因数の和:755

約数の個数: 32

約数和(自身を含む): 35599872

約数和(自身を除く): 14106309

約数列:

[1, 3, 7, 13, 21, 39, 91, 131, 273, 393, 601, 917, 1703, 1803, 2751, 4207, 5109, 7813, 11921, 12621, 23439, 35763, 54691, 78731, 164073, 236193, 551117, 1023503, 1653351, 3070509, 7164521, 21493563]

約数ペア:

[(1, 21493563), (3, 7164521), (7, 3070509), (13, 1653351), (21, 1023503), (39, 551117), (91, 236193), (131, 164073), (273, 78731), (393, 54691), (601, 35763), (917, 23439), (1703, 12621), (1803, 11921), (2751, 7813), (4207, 5109)]