20157.000000

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1$

素因数の和:117

約数の個数: 24

約数和(自身を含む): 1060992

約数和(自身を除く): 342827

約数列:

[1, 5, 7, 17, 35, 71, 85, 119, 289, 355, 497, 595, 1207, 1445, 2023, 2485, 6035, 8449, 10115, 20519, 42245, 102595, 143633, 718165]

約数ペア:

[(1, 718165), (5, 143633), (7, 102595), (17, 42245), (35, 20519), (71, 10115), (85, 8449), (119, 6035), (289, 2485), (355, 2023), (497, 1445), (595, 1207)]