19687580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{821}}^1$

素因数の和:950

約数の個数: 48

約数和(自身を含む): 45571680

約数和(自身を除く): 25884100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 821, 1090, 1199, 1642, 2180, 2398, 3284, 4105, 4796, 5995, 8210, 9031, 11990, 16420, 18062, 23980, 36124, 45155, 89489, 90310, 178978, 180620, 357956, 447445, 894890, 984379, 1789780, 1968758, 3937516, 4921895, 9843790, 19687580]

約数ペア:

[(1, 19687580), (2, 9843790), (4, 4921895), (5, 3937516), (10, 1968758), (11, 1789780), (20, 984379), (22, 894890), (44, 447445), (55, 357956), (109, 180620), (110, 178978), (218, 90310), (220, 89489), (436, 45155), (545, 36124), (821, 23980), (1090, 18062), (1199, 16420), (1642, 11990), (2180, 9031), (2398, 8210), (3284, 5995), (4105, 4796)]