21260967

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1657}}^1$

素因数の和:1727

約数の個数: 32

約数和(自身を含む): 35653632

約数和(自身を除く): 14392665

約数列:

[1, 3, 7, 13, 21, 39, 47, 91, 141, 273, 329, 611, 987, 1657, 1833, 4277, 4971, 11599, 12831, 21541, 34797, 64623, 77879, 150787, 233637, 452361, 545153, 1012427, 1635459, 3037281, 7086989, 21260967]

約数ペア:

[(1, 21260967), (3, 7086989), (7, 3037281), (13, 1635459), (21, 1012427), (39, 545153), (47, 452361), (91, 233637), (141, 150787), (273, 77879), (329, 64623), (611, 34797), (987, 21541), (1657, 12831), (1833, 11599), (4277, 4971)]