20381080

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 48263040

約数和(自身を除く): 27881960

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 47, 74, 94, 148, 185, 188, 235, 293, 296, 370, 376, 470, 586, 740, 940, 1172, 1465, 1480, 1739, 1880, 2344, 2930, 3478, 5860, 6956, 8695, 10841, 11720, 13771, 13912, 17390, 21682, 27542, 34780, 43364, 54205, 55084, 68855, 69560, 86728, 108410, 110168, 137710, 216820, 275420, 433640, 509527, 550840, 1019054, 2038108, 2547635, 4076216, 5095270, 10190540, 20381080]

約数ペア:

[(1, 20381080), (2, 10190540), (4, 5095270), (5, 4076216), (8, 2547635), (10, 2038108), (20, 1019054), (37, 550840), (40, 509527), (47, 433640), (74, 275420), (94, 216820), (148, 137710), (185, 110168), (188, 108410), (235, 86728), (293, 69560), (296, 68855), (370, 55084), (376, 54205), (470, 43364), (586, 34780), (740, 27542), (940, 21682), (1172, 17390), (1465, 13912), (1480, 13771), (1739, 11720), (1880, 10841), (2344, 8695), (2930, 6956), (3478, 5860)]