21683781

素因数分解:

$3^4\times 7^1\times {\mathrm{167}}^1\times {\mathrm{229}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 37403520

約数和(自身を除く): 15719739

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 167, 189, 229, 501, 567, 687, 1169, 1503, 1603, 2061, 3507, 4509, 4809, 6183, 10521, 13527, 14427, 18549, 31563, 38243, 43281, 94689, 114729, 129843, 267701, 344187, 803103, 1032561, 2409309, 3097683, 7227927, 21683781]

約数ペア:

[(1, 21683781), (3, 7227927), (7, 3097683), (9, 2409309), (21, 1032561), (27, 803103), (63, 344187), (81, 267701), (167, 129843), (189, 114729), (229, 94689), (501, 43281), (567, 38243), (687, 31563), (1169, 18549), (1503, 14427), (1603, 13527), (2061, 10521), (3507, 6183), (4509, 4809)]