20535280

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1303}}^1$

素因数の和:1513

約数の個数: 40

約数和(自身を含む): 48023712

約数和(自身を除く): 27488432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1303, 1576, 1970, 2606, 3152, 3940, 5212, 6515, 7880, 10424, 13030, 15760, 20848, 26060, 52120, 104240, 256691, 513382, 1026764, 1283455, 2053528, 2566910, 4107056, 5133820, 10267640, 20535280]

約数ペア:

[(1, 20535280), (2, 10267640), (4, 5133820), (5, 4107056), (8, 2566910), (10, 2053528), (16, 1283455), (20, 1026764), (40, 513382), (80, 256691), (197, 104240), (394, 52120), (788, 26060), (985, 20848), (1303, 15760), (1576, 13030), (1970, 10424), (2606, 7880), (3152, 6515), (3940, 5212)]