20757080

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:300

約数の個数: 64

約数和(自身を含む): 48746880

約数和(自身を除く): 27989800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 181, 188, 235, 244, 305, 362, 376, 470, 488, 610, 724, 905, 940, 1220, 1448, 1810, 1880, 2440, 2867, 3620, 5734, 7240, 8507, 11041, 11468, 14335, 17014, 22082, 22936, 28670, 34028, 42535, 44164, 55205, 57340, 68056, 85070, 88328, 110410, 114680, 170140, 220820, 340280, 441640, 518927, 1037854, 2075708, 2594635, 4151416, 5189270, 10378540, 20757080]

約数ペア:

[(1, 20757080), (2, 10378540), (4, 5189270), (5, 4151416), (8, 2594635), (10, 2075708), (20, 1037854), (40, 518927), (47, 441640), (61, 340280), (94, 220820), (122, 170140), (181, 114680), (188, 110410), (235, 88328), (244, 85070), (305, 68056), (362, 57340), (376, 55205), (470, 44164), (488, 42535), (610, 34028), (724, 28670), (905, 22936), (940, 22082), (1220, 17014), (1448, 14335), (1810, 11468), (1880, 11041), (2440, 8507), (2867, 7240), (3620, 5734)]