19997560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{967}}^1$

素因数の和:1036

約数の個数: 64

約数和(自身を含む): 50181120

約数和(自身を除く): 30183560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 967, 1034, 1880, 1934, 2068, 2585, 3868, 4136, 4835, 5170, 7736, 9670, 10340, 10637, 19340, 20680, 21274, 38680, 42548, 45449, 53185, 85096, 90898, 106370, 181796, 212740, 227245, 363592, 425480, 454490, 499939, 908980, 999878, 1817960, 1999756, 2499695, 3999512, 4999390, 9998780, 19997560]

約数ペア:

[(1, 19997560), (2, 9998780), (4, 4999390), (5, 3999512), (8, 2499695), (10, 1999756), (11, 1817960), (20, 999878), (22, 908980), (40, 499939), (44, 454490), (47, 425480), (55, 363592), (88, 227245), (94, 212740), (110, 181796), (188, 106370), (220, 90898), (235, 85096), (376, 53185), (440, 45449), (470, 42548), (517, 38680), (940, 21274), (967, 20680), (1034, 19340), (1880, 10637), (1934, 10340), (2068, 9670), (2585, 7736), (3868, 5170), (4136, 4835)]