19725640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{353}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 48936960

約数和(自身を除く): 29211320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 127, 220, 254, 353, 440, 508, 635, 706, 1016, 1270, 1397, 1412, 1765, 2540, 2794, 2824, 3530, 3883, 5080, 5588, 6985, 7060, 7766, 11176, 13970, 14120, 15532, 19415, 27940, 31064, 38830, 44831, 55880, 77660, 89662, 155320, 179324, 224155, 358648, 448310, 493141, 896620, 986282, 1793240, 1972564, 2465705, 3945128, 4931410, 9862820, 19725640]

約数ペア:

[(1, 19725640), (2, 9862820), (4, 4931410), (5, 3945128), (8, 2465705), (10, 1972564), (11, 1793240), (20, 986282), (22, 896620), (40, 493141), (44, 448310), (55, 358648), (88, 224155), (110, 179324), (127, 155320), (220, 89662), (254, 77660), (353, 55880), (440, 44831), (508, 38830), (635, 31064), (706, 27940), (1016, 19415), (1270, 15532), (1397, 14120), (1412, 13970), (1765, 11176), (2540, 7766), (2794, 7060), (2824, 6985), (3530, 5588), (3883, 5080)]