64805420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79031}}^1$

素因数の和:79081

約数の個数: 24

約数和(自身を含む): 139412448

約数和(自身を除く): 74607028

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 79031, 158062, 316124, 395155, 790310, 1580620, 3240271, 6480542, 12961084, 16201355, 32402710, 64805420]

約数ペア:

[(1, 64805420), (2, 32402710), (4, 16201355), (5, 12961084), (10, 6480542), (20, 3240271), (41, 1580620), (82, 790310), (164, 395155), (205, 316124), (410, 158062), (820, 79031)]