19659890

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{63419}}^1$

素因数の和:63457

約数の個数: 16

約数和(自身を含む): 36529920

約数和(自身を除く): 16870030

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 63419, 126838, 317095, 634190, 1965989, 3931978, 9829945, 19659890]

約数ペア:

[(1, 19659890), (2, 9829945), (5, 3931978), (10, 1965989), (31, 634190), (62, 317095), (155, 126838), (310, 63419)]