21252985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8837}}^1$

素因数の和:8892

約数の個数: 16

約数和(自身を含む): 28210896

約数和(自身を除く): 6957911

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8837, 44185, 114881, 326969, 574405, 1634845, 4250597, 21252985]

約数ペア:

[(1, 21252985), (5, 4250597), (13, 1634845), (37, 574405), (65, 326969), (185, 114881), (481, 44185), (2405, 8837)]