21002849

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{487}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 24688896

約数和(自身を除く): 3686047

約数列:

[1, 7, 61, 101, 427, 487, 707, 3409, 6161, 29707, 43127, 49187, 207949, 344309, 3000407, 21002849]

約数ペア:

[(1, 21002849), (7, 3000407), (61, 344309), (101, 207949), (427, 49187), (487, 43127), (707, 29707), (3409, 6161)]