21443919

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{8581}}^1$

素因数の和:8615

約数の個数: 24

約数和(自身を含む): 35220528

約数和(自身を除く): 13776609

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 8581, 25743, 60067, 145877, 180201, 420469, 437631, 1021139, 1261407, 3063417, 7147973, 21443919]

約数ペア:

[(1, 21443919), (3, 7147973), (7, 3063417), (17, 1261407), (21, 1021139), (49, 437631), (51, 420469), (119, 180201), (147, 145877), (357, 60067), (833, 25743), (2499, 8581)]