20680990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{821}}^1$

素因数の和:1068

約数の個数: 32

約数和(自身を含む): 40836960

約数和(自身を除く): 20155970

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 229, 458, 821, 1145, 1642, 2290, 2519, 4105, 5038, 8210, 9031, 12595, 18062, 25190, 45155, 90310, 188009, 376018, 940045, 1880090, 2068099, 4136198, 10340495, 20680990]

約数ペア:

[(1, 20680990), (2, 10340495), (5, 4136198), (10, 2068099), (11, 1880090), (22, 940045), (55, 376018), (110, 188009), (229, 90310), (458, 45155), (821, 25190), (1145, 18062), (1642, 12595), (2290, 9031), (2519, 8210), (4105, 5038)]