21378705

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{75013}}^1$

素因数の和:75040

約数の個数: 16

約数和(自身を含む): 36006720

約数和(自身を除く): 14628015

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 75013, 225039, 375065, 1125195, 1425247, 4275741, 7126235, 21378705]

約数ペア:

[(1, 21378705), (3, 7126235), (5, 4275741), (15, 1425247), (19, 1125195), (57, 375065), (95, 225039), (285, 75013)]