640369515

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2511253}}^1$

素因数の和:2511278

約数の個数: 16

約数和(自身を含む): 1084861728

約数和(自身を除く): 444492213

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 2511253, 7533759, 12556265, 37668795, 42691301, 128073903, 213456505, 640369515]

約数ペア:

[(1, 640369515), (3, 213456505), (5, 128073903), (15, 42691301), (17, 37668795), (51, 12556265), (85, 7533759), (255, 2511253)]