21280778813

素因数分解:

$7^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{193379}}^1$

素因数の和:193664

約数の個数: 16

約数和(自身を含む): 24752640000

約数和(自身を除く): 3471861187

約数列:

[1, 7, 79, 199, 553, 1393, 15721, 110047, 193379, 1353653, 15276941, 38482421, 106938587, 269376947, 3040111259, 21280778813]

約数ペア:

[(1, 21280778813), (7, 3040111259), (79, 269376947), (199, 106938587), (553, 38482421), (1393, 15276941), (15721, 1353653), (110047, 193379)]