20689955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1523}}^1$

素因数の和:1571

約数の個数: 32

約数和(自身を含む): 30723840

約数和(自身を除く): 10033885

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1523, 2717, 7615, 13585, 16753, 19799, 28937, 83765, 98995, 144685, 217789, 318307, 376181, 1088945, 1591535, 1880905, 4137991, 20689955]

約数ペア:

[(1, 20689955), (5, 4137991), (11, 1880905), (13, 1591535), (19, 1088945), (55, 376181), (65, 318307), (95, 217789), (143, 144685), (209, 98995), (247, 83765), (715, 28937), (1045, 19799), (1235, 16753), (1523, 13585), (2717, 7615)]