21258465

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19961}}^1$

素因数の和:20040

約数の個数: 16

約数和(自身を含む): 34494336

約数和(自身を除く): 13235871

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19961, 59883, 99805, 299415, 1417231, 4251693, 7086155, 21258465]

約数ペア:

[(1, 21258465), (3, 7086155), (5, 4251693), (15, 1417231), (71, 299415), (213, 99805), (355, 59883), (1065, 19961)]