21428065

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1\times {\mathrm{479}}^1$

素因数の和:896

約数の個数: 16

約数和(自身を含む): 26956800

約数和(自身を除く): 5528735

約数列:

[1, 5, 23, 115, 389, 479, 1945, 2395, 8947, 11017, 44735, 55085, 186331, 931655, 4285613, 21428065]

約数ペア:

[(1, 21428065), (5, 4285613), (23, 931655), (115, 186331), (389, 55085), (479, 44735), (1945, 11017), (2395, 8947)]