21084357

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7549}}^1$

素因数の和:7585

約数の個数: 24

約数和(自身を含む): 34428000

約数和(自身を除く): 13343643

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7549, 22647, 52843, 143431, 158529, 369901, 430293, 1004017, 1109703, 3012051, 7028119, 21084357]

約数ペア:

[(1, 21084357), (3, 7028119), (7, 3012051), (19, 1109703), (21, 1004017), (49, 430293), (57, 369901), (133, 158529), (147, 143431), (399, 52843), (931, 22647), (2793, 7549)]