131438980

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{21407}}^1$

素因数の和:21723

約数の個数: 24

約数和(自身を含む): 276933888

約数和(自身を除く): 145494908

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 6140, 21407, 42814, 85628, 107035, 214070, 428140, 6571949, 13143898, 26287796, 32859745, 65719490, 131438980]

約数ペア:

[(1, 131438980), (2, 65719490), (4, 32859745), (5, 26287796), (10, 13143898), (20, 6571949), (307, 428140), (614, 214070), (1228, 107035), (1535, 85628), (3070, 42814), (6140, 21407)]