81828380

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{45971}}^1$

素因数の和:46069

約数の個数: 24

約数和(自身を含む): 173774160

約数和(自身を除く): 91945780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 45971, 91942, 183884, 229855, 459710, 919420, 4091419, 8182838, 16365676, 20457095, 40914190, 81828380]

約数ペア:

[(1, 81828380), (2, 40914190), (4, 20457095), (5, 16365676), (10, 8182838), (20, 4091419), (89, 919420), (178, 459710), (356, 229855), (445, 183884), (890, 91942), (1780, 45971)]