18854654320

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2162231}}^1$

素因数の和:2162353

約数の個数: 40

約数和(自身を含む): 44239266720

約数和(自身を除く): 25384612400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360, 8720, 2162231, 4324462, 8648924, 10811155, 17297848, 21622310, 34595696, 43244620, 86489240, 172978480, 235683179, 471366358, 942732716, 1178415895, 1885465432, 2356831790, 3770930864, 4713663580, 9427327160, 18854654320]

約数ペア:

[(1, 18854654320), (2, 9427327160), (4, 4713663580), (5, 3770930864), (8, 2356831790), (10, 1885465432), (16, 1178415895), (20, 942732716), (40, 471366358), (80, 235683179), (109, 172978480), (218, 86489240), (436, 43244620), (545, 34595696), (872, 21622310), (1090, 17297848), (1744, 10811155), (2180, 8648924), (4360, 4324462), (8720, 2162231)]