20438290

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{19843}}^1$

素因数の和:19953

約数の個数: 16

約数和(自身を含む): 37147968

約数和(自身を除く): 16709678

約数列:

[1, 2, 5, 10, 103, 206, 515, 1030, 19843, 39686, 99215, 198430, 2043829, 4087658, 10219145, 20438290]

約数ペア:

[(1, 20438290), (2, 10219145), (5, 4087658), (10, 2043829), (103, 198430), (206, 99215), (515, 39686), (1030, 19843)]