21387642

素因数分解:

$2^1\times 3^1\times {\mathrm{421}}^1\times {\mathrm{8467}}^1$

素因数の和:8893

約数の個数: 16

約数和(自身を含む): 42881952

約数和(自身を除く): 21494310

約数列:

[1, 2, 3, 6, 421, 842, 1263, 2526, 8467, 16934, 25401, 50802, 3564607, 7129214, 10693821, 21387642]

約数ペア:

[(1, 21387642), (2, 10693821), (3, 7129214), (6, 3564607), (421, 50802), (842, 25401), (1263, 16934), (2526, 8467)]