18979792

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{91249}}^1$

素因数の和:91270

約数の個数: 20

約数和(自身を含む): 39602500

約数和(自身を除く): 20622708

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 91249, 182498, 364996, 729992, 1186237, 1459984, 2372474, 4744948, 9489896, 18979792]

約数ペア:

[(1, 18979792), (2, 9489896), (4, 4744948), (8, 2372474), (13, 1459984), (16, 1186237), (26, 729992), (52, 364996), (104, 182498), (208, 91249)]