21255728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102191}}^1$

素因数の和:102212

約数の個数: 20

約数和(自身を含む): 44351328

約数和(自身を除く): 23095600

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102191, 204382, 408764, 817528, 1328483, 1635056, 2656966, 5313932, 10627864, 21255728]

約数ペア:

[(1, 21255728), (2, 10627864), (4, 5313932), (8, 2656966), (13, 1635056), (16, 1328483), (26, 817528), (52, 408764), (104, 204382), (208, 102191)]