21857080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{311}}^1$

素因数の和:580

約数の個数: 64

約数和(自身を含む): 56609280

約数和(自身を除く): 34752200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 311, 502, 622, 1004, 1244, 1255, 1555, 1757, 2008, 2177, 2488, 2510, 3110, 3514, 4354, 5020, 6220, 7028, 8708, 8785, 10040, 10885, 12440, 14056, 17416, 17570, 21770, 35140, 43540, 70280, 78061, 87080, 156122, 312244, 390305, 546427, 624488, 780610, 1092854, 1561220, 2185708, 2732135, 3122440, 4371416, 5464270, 10928540, 21857080]

約数ペア:

[(1, 21857080), (2, 10928540), (4, 5464270), (5, 4371416), (7, 3122440), (8, 2732135), (10, 2185708), (14, 1561220), (20, 1092854), (28, 780610), (35, 624488), (40, 546427), (56, 390305), (70, 312244), (140, 156122), (251, 87080), (280, 78061), (311, 70280), (502, 43540), (622, 35140), (1004, 21770), (1244, 17570), (1255, 17416), (1555, 14056), (1757, 12440), (2008, 10885), (2177, 10040), (2488, 8785), (2510, 8708), (3110, 7028), (3514, 6220), (4354, 5020)]