20781512

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{2131}}^1$

素因数の和:2213

約数の個数: 32

約数和(自身を含む): 41446080

約数和(自身を除く): 20664568

約数列:

[1, 2, 4, 8, 23, 46, 53, 92, 106, 184, 212, 424, 1219, 2131, 2438, 4262, 4876, 8524, 9752, 17048, 49013, 98026, 112943, 196052, 225886, 392104, 451772, 903544, 2597689, 5195378, 10390756, 20781512]

約数ペア:

[(1, 20781512), (2, 10390756), (4, 5195378), (8, 2597689), (23, 903544), (46, 451772), (53, 392104), (92, 225886), (106, 196052), (184, 112943), (212, 98026), (424, 49013), (1219, 17048), (2131, 9752), (2438, 8524), (4262, 4876)]