1278930215

素因数分解:

$5^1\times {\mathrm{199}}^1\times {\mathrm{643}}^1\times {\mathrm{1999}}^1$

素因数の和:2846

約数の個数: 16

約数和(自身を含む): 1545600000

約数和(自身を除く): 266669785

約数列:

[1, 5, 199, 643, 995, 1999, 3215, 9995, 127957, 397801, 639785, 1285357, 1989005, 6426785, 255786043, 1278930215]

約数ペア:

[(1, 1278930215), (5, 255786043), (199, 6426785), (643, 1989005), (995, 1285357), (1999, 639785), (3215, 397801), (9995, 127957)]