19975516

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{5101}}^1$

素因数の和:5205

約数の個数: 24

約数和(自身を含む): 38571120

約数和(自身を除く): 18595604

約数列:

[1, 2, 4, 11, 22, 44, 89, 178, 356, 979, 1958, 3916, 5101, 10202, 20404, 56111, 112222, 224444, 453989, 907978, 1815956, 4993879, 9987758, 19975516]

約数ペア:

[(1, 19975516), (2, 9987758), (4, 4993879), (11, 1815956), (22, 907978), (44, 453989), (89, 224444), (178, 112222), (356, 56111), (979, 20404), (1958, 10202), (3916, 5101)]