129612920

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{20639}}^1$

素因数の和:20807

約数の個数: 32

約数和(自身を含む): 293500800

約数和(自身を除く): 163887880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 20639, 41278, 82556, 103195, 165112, 206390, 412780, 825560, 3240323, 6480646, 12961292, 16201615, 25922584, 32403230, 64806460, 129612920]

約数ペア:

[(1, 129612920), (2, 64806460), (4, 32403230), (5, 25922584), (8, 16201615), (10, 12961292), (20, 6480646), (40, 3240323), (157, 825560), (314, 412780), (628, 206390), (785, 165112), (1256, 103195), (1570, 82556), (3140, 41278), (6280, 20639)]