21161955

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61339}}^1$

素因数の和:61370

約数の個数: 16

約数和(自身を含む): 35331840

約数和(自身を除く): 14169885

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61339, 184017, 306695, 920085, 1410797, 4232391, 7053985, 21161955]

約数ペア:

[(1, 21161955), (3, 7053985), (5, 4232391), (15, 1410797), (23, 920085), (69, 306695), (115, 184017), (345, 61339)]