20262280

素因数分解:

$2^3\times 5^1\times {\mathrm{617}}^1\times {\mathrm{821}}^1$

素因数の和:1449

約数の個数: 32

約数和(自身を含む): 45719640

約数和(自身を除く): 25457360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 617, 821, 1234, 1642, 2468, 3085, 3284, 4105, 4936, 6170, 6568, 8210, 12340, 16420, 24680, 32840, 506557, 1013114, 2026228, 2532785, 4052456, 5065570, 10131140, 20262280]

約数ペア:

[(1, 20262280), (2, 10131140), (4, 5065570), (5, 4052456), (8, 2532785), (10, 2026228), (20, 1013114), (40, 506557), (617, 32840), (821, 24680), (1234, 16420), (1642, 12340), (2468, 8210), (3085, 6568), (3284, 6170), (4105, 4936)]