64879120

素因数分解:

$2^4\times 5^1\times {\mathrm{810989}}^1$

素因数の和:811002

約数の個数: 20

約数和(自身を含む): 150844140

約数和(自身を除く): 85965020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810989, 1621978, 3243956, 4054945, 6487912, 8109890, 12975824, 16219780, 32439560, 64879120]

約数ペア:

[(1, 64879120), (2, 32439560), (4, 16219780), (5, 12975824), (8, 8109890), (10, 6487912), (16, 4054945), (20, 3243956), (40, 1621978), (80, 810989)]