21119405

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{2741}}^1$

素因数の和:2836

約数の個数: 16

約数和(自身を含む): 26849664

約数和(自身を除く): 5730259

約数列:

[1, 5, 23, 67, 115, 335, 1541, 2741, 7705, 13705, 63043, 183647, 315215, 918235, 4223881, 21119405]

約数ペア:

[(1, 21119405), (5, 4223881), (23, 918235), (67, 315215), (115, 183647), (335, 63043), (1541, 13705), (2741, 7705)]