20913970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:355

約数の個数: 64

約数和(自身を含む): 47506176

約数和(自身を除く): 26592206

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 157, 173, 314, 346, 385, 770, 785, 865, 1099, 1211, 1570, 1727, 1730, 1903, 2198, 2422, 3454, 3806, 5495, 6055, 8635, 9515, 10990, 12089, 12110, 13321, 17270, 19030, 24178, 26642, 27161, 54322, 60445, 66605, 120890, 133210, 135805, 190127, 271610, 298771, 380254, 597542, 950635, 1493855, 1901270, 2091397, 2987710, 4182794, 10456985, 20913970]

約数ペア:

[(1, 20913970), (2, 10456985), (5, 4182794), (7, 2987710), (10, 2091397), (11, 1901270), (14, 1493855), (22, 950635), (35, 597542), (55, 380254), (70, 298771), (77, 271610), (110, 190127), (154, 135805), (157, 133210), (173, 120890), (314, 66605), (346, 60445), (385, 54322), (770, 27161), (785, 26642), (865, 24178), (1099, 19030), (1211, 17270), (1570, 13321), (1727, 12110), (1730, 12089), (1903, 10990), (2198, 9515), (2422, 8635), (3454, 6055), (3806, 5495)]