399959425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{20023}}^1$

素因数の和:20097

約数の個数: 24

約数和(自身を含む): 536322816

約数和(自身を除く): 136363391

約数列:

[1, 5, 17, 25, 47, 85, 235, 425, 799, 1175, 3995, 19975, 20023, 100115, 340391, 500575, 941081, 1701955, 4705405, 8509775, 15998377, 23527025, 79991885, 399959425]

約数ペア:

[(1, 399959425), (5, 79991885), (17, 23527025), (25, 15998377), (47, 8509775), (85, 4705405), (235, 1701955), (425, 941081), (799, 500575), (1175, 340391), (3995, 100115), (19975, 20023)]