21298605

素因数分解:

$3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{5657}}^1$

素因数の和:5916

約数の個数: 16

約数和(自身を含む): 34219584

約数和(自身を除く): 12920979

約数列:

[1, 3, 5, 15, 251, 753, 1255, 3765, 5657, 16971, 28285, 84855, 1419907, 4259721, 7099535, 21298605]

約数ペア:

[(1, 21298605), (3, 7099535), (5, 4259721), (15, 1419907), (251, 84855), (753, 28285), (1255, 16971), (3765, 5657)]