21221755

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{1693}}^1$

素因数の和:1830

約数の個数: 16

約数和(自身を含む): 26832960

約数和(自身を除く): 5611205

約数列:

[1, 5, 23, 109, 115, 545, 1693, 2507, 8465, 12535, 38939, 184537, 194695, 922685, 4244351, 21221755]

約数ペア:

[(1, 21221755), (5, 4244351), (23, 922685), (109, 194695), (115, 184537), (545, 38939), (1693, 12535), (2507, 8465)]