21557776

素因数分解:

$2^4\times {\mathrm{73}}^1\times {\mathrm{18457}}^1$

素因数の和:18538

約数の個数: 20

約数和(自身を含む): 42342652

約数和(自身を除く): 20784876

約数列:

[1, 2, 4, 8, 16, 73, 146, 292, 584, 1168, 18457, 36914, 73828, 147656, 295312, 1347361, 2694722, 5389444, 10778888, 21557776]

約数ペア:

[(1, 21557776), (2, 10778888), (4, 5389444), (8, 2694722), (16, 1347361), (73, 295312), (146, 147656), (292, 73828), (584, 36914), (1168, 18457)]