81810819

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{211}}^1\times {\mathrm{643}}^1$

素因数の和:927

約数の個数: 24

約数和(自身を含む): 120690752

約数和(自身を除く): 38879933

約数列:

[1, 3, 9, 67, 201, 211, 603, 633, 643, 1899, 1929, 5787, 14137, 42411, 43081, 127233, 129243, 135673, 387729, 407019, 1221057, 9090091, 27270273, 81810819]

約数ペア:

[(1, 81810819), (3, 27270273), (9, 9090091), (67, 1221057), (201, 407019), (211, 387729), (603, 135673), (633, 129243), (643, 127233), (1899, 43081), (1929, 42411), (5787, 14137)]