21129008

素因数分解:

$2^4\times {\mathrm{103}}^1\times {\mathrm{12821}}^1$

素因数の和:12932

約数の個数: 20

約数和(自身を含む): 41338128

約数和(自身を除く): 20209120

約数列:

[1, 2, 4, 8, 16, 103, 206, 412, 824, 1648, 12821, 25642, 51284, 102568, 205136, 1320563, 2641126, 5282252, 10564504, 21129008]

約数ペア:

[(1, 21129008), (2, 10564504), (4, 5282252), (8, 2641126), (16, 1320563), (103, 205136), (206, 102568), (412, 51284), (824, 25642), (1648, 12821)]