21178285

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{3019}}^1$

素因数の和:3108

約数の個数: 16

約数和(自身を含む): 26962560

約数和(自身を除く): 5784275

約数列:

[1, 5, 23, 61, 115, 305, 1403, 3019, 7015, 15095, 69437, 184159, 347185, 920795, 4235657, 21178285]

約数ペア:

[(1, 21178285), (5, 4235657), (23, 920795), (61, 347185), (115, 184159), (305, 69437), (1403, 15095), (3019, 7015)]