20985718

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{601}}^1$

素因数の和:712

約数の個数: 32

約数和(自身を含む): 36408960

約数和(自身を除く): 15423242

約数列:

[1, 2, 13, 17, 26, 34, 79, 158, 221, 442, 601, 1027, 1202, 1343, 2054, 2686, 7813, 10217, 15626, 17459, 20434, 34918, 47479, 94958, 132821, 265642, 617227, 807143, 1234454, 1614286, 10492859, 20985718]

約数ペア:

[(1, 20985718), (2, 10492859), (13, 1614286), (17, 1234454), (26, 807143), (34, 617227), (79, 265642), (158, 132821), (221, 94958), (442, 47479), (601, 34918), (1027, 20434), (1202, 17459), (1343, 15626), (2054, 10217), (2686, 7813)]