21996905

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{10303}}^1$

素因数の和:10376

約数の個数: 16

約数和(自身を含む): 30664704

約数和(自身を除く): 8667799

約数列:

[1, 5, 7, 35, 61, 305, 427, 2135, 10303, 51515, 72121, 360605, 628483, 3142415, 4399381, 21996905]

約数ペア:

[(1, 21996905), (5, 4399381), (7, 3142415), (35, 628483), (61, 360605), (305, 72121), (427, 51515), (2135, 10303)]