19990545

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 33196800

約数和(自身を除く): 13206255

約数列:

[1, 3, 5, 15, 37, 111, 181, 185, 199, 543, 555, 597, 905, 995, 2715, 2985, 6697, 7363, 20091, 22089, 33485, 36019, 36815, 100455, 108057, 110445, 180095, 540285, 1332703, 3998109, 6663515, 19990545]

約数ペア:

[(1, 19990545), (3, 6663515), (5, 3998109), (15, 1332703), (37, 540285), (111, 180095), (181, 110445), (185, 108057), (199, 100455), (543, 36815), (555, 36019), (597, 33485), (905, 22089), (995, 20091), (2715, 7363), (2985, 6697)]