20987894

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{613}}^1$

素因数の和:704

約数の個数: 32

約数和(自身を含む): 35808480

約数和(自身を除く): 14820586

約数列:

[1, 2, 17, 19, 34, 38, 53, 106, 323, 613, 646, 901, 1007, 1226, 1802, 2014, 10421, 11647, 17119, 20842, 23294, 32489, 34238, 64978, 197999, 395998, 552313, 617291, 1104626, 1234582, 10493947, 20987894]

約数ペア:

[(1, 20987894), (2, 10493947), (17, 1234582), (19, 1104626), (34, 617291), (38, 552313), (53, 395998), (106, 197999), (323, 64978), (613, 34238), (646, 32489), (901, 23294), (1007, 20842), (1226, 17119), (1802, 11647), (2014, 10421)]