21000399

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21277}}^1$

素因数の和:21334

約数の個数: 16

約数和(自身を含む): 32683008

約数和(自身を除く): 11682609

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21277, 63831, 148939, 446817, 1000019, 3000057, 7000133, 21000399]

約数ペア:

[(1, 21000399), (3, 7000133), (7, 3000057), (21, 1000019), (47, 446817), (141, 148939), (329, 63831), (987, 21277)]