21819411

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{307}}^1$

素因数の和:515

約数の個数: 24

約数和(自身を含む): 32432400

約数和(自身を除く): 10612989

約数列:

[1, 3, 9, 53, 149, 159, 307, 447, 477, 921, 1341, 2763, 7897, 16271, 23691, 45743, 48813, 71073, 137229, 146439, 411687, 2424379, 7273137, 21819411]

約数ペア:

[(1, 21819411), (3, 7273137), (9, 2424379), (53, 411687), (149, 146439), (159, 137229), (307, 71073), (447, 48813), (477, 45743), (921, 23691), (1341, 16271), (2763, 7897)]