19712539

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{3821}}^1$

素因数の和:3906

約数の個数: 16

約数和(自身を含む): 24950016

約数和(自身を除く): 5237477

約数列:

[1, 7, 11, 67, 77, 469, 737, 3821, 5159, 26747, 42031, 256007, 294217, 1792049, 2816077, 19712539]

約数ペア:

[(1, 19712539), (7, 2816077), (11, 1792049), (67, 294217), (77, 256007), (469, 42031), (737, 26747), (3821, 5159)]