20945776

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{1321}}^1$

素因数の和:2320

約数の個数: 20

約数和(自身を含む): 40654144

約数和(自身を除く): 19708368

約数列:

[1, 2, 4, 8, 16, 991, 1321, 1982, 2642, 3964, 5284, 7928, 10568, 15856, 21136, 1309111, 2618222, 5236444, 10472888, 20945776]

約数ペア:

[(1, 20945776), (2, 10472888), (4, 5236444), (8, 2618222), (16, 1309111), (991, 21136), (1321, 15856), (1982, 10568), (2642, 7928), (3964, 5284)]