82891420

素因数分解:

$2^2\times 5^1\times {\mathrm{1039}}^1\times {\mathrm{3989}}^1$

素因数の和:5037

約数の個数: 24

約数和(自身を含む): 174283200

約数和(自身を除く): 91391780

約数列:

[1, 2, 4, 5, 10, 20, 1039, 2078, 3989, 4156, 5195, 7978, 10390, 15956, 19945, 20780, 39890, 79780, 4144571, 8289142, 16578284, 20722855, 41445710, 82891420]

約数ペア:

[(1, 82891420), (2, 41445710), (4, 20722855), (5, 16578284), (10, 8289142), (20, 4144571), (1039, 79780), (2078, 39890), (3989, 20780), (4156, 19945), (5195, 15956), (7978, 10390)]