20778220

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12517}}^1$

素因数の和:12609

約数の個数: 24

約数和(自身を含む): 44163504

約数和(自身を除く): 23385284

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12517, 25034, 50068, 62585, 125170, 250340, 1038911, 2077822, 4155644, 5194555, 10389110, 20778220]

約数ペア:

[(1, 20778220), (2, 10389110), (4, 5194555), (5, 4155644), (10, 2077822), (20, 1038911), (83, 250340), (166, 125170), (332, 62585), (415, 50068), (830, 25034), (1660, 12517)]