18080420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{461}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 39817008

約数和(自身を除く): 21736588

約数列:

[1, 2, 4, 5, 10, 20, 37, 53, 74, 106, 148, 185, 212, 265, 370, 461, 530, 740, 922, 1060, 1844, 1961, 2305, 3922, 4610, 7844, 9220, 9805, 17057, 19610, 24433, 34114, 39220, 48866, 68228, 85285, 97732, 122165, 170570, 244330, 341140, 488660, 904021, 1808042, 3616084, 4520105, 9040210, 18080420]

約数ペア:

[(1, 18080420), (2, 9040210), (4, 4520105), (5, 3616084), (10, 1808042), (20, 904021), (37, 488660), (53, 341140), (74, 244330), (106, 170570), (148, 122165), (185, 97732), (212, 85285), (265, 68228), (370, 48866), (461, 39220), (530, 34114), (740, 24433), (922, 19610), (1060, 17057), (1844, 9805), (1961, 9220), (2305, 7844), (3922, 4610)]