19387420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{74567}}^1$

素因数の和:74589

約数の個数: 24

約数和(自身を含む): 43845984

約数和(自身を除く): 24458564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 74567, 149134, 298268, 372835, 745670, 969371, 1491340, 1938742, 3877484, 4846855, 9693710, 19387420]

約数ペア:

[(1, 19387420), (2, 9693710), (4, 4846855), (5, 3877484), (10, 1938742), (13, 1491340), (20, 969371), (26, 745670), (52, 372835), (65, 298268), (130, 149134), (260, 74567)]