21690265

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{4013}}^1$

素因数の和:4088

約数の個数: 16

約数和(自身を含む): 27744768

約数和(自身を除く): 6054503

約数列:

[1, 5, 23, 47, 115, 235, 1081, 4013, 5405, 20065, 92299, 188611, 461495, 943055, 4338053, 21690265]

約数ペア:

[(1, 21690265), (5, 4338053), (23, 943055), (47, 461495), (115, 188611), (235, 92299), (1081, 20065), (4013, 5405)]