20991802

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{21821}}^1$

素因数の和:21873

約数の個数: 16

約数和(自身を含む): 34827912

約数和(自身を除く): 13836110

約数列:

[1, 2, 13, 26, 37, 74, 481, 962, 21821, 43642, 283673, 567346, 807377, 1614754, 10495901, 20991802]

約数ペア:

[(1, 20991802), (2, 10495901), (13, 1614754), (26, 807377), (37, 567346), (74, 283673), (481, 43642), (962, 21821)]