20989704

素因数分解:

$2^3\times 3^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 54613440

約数和(自身を除く): 33623736

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 41, 82, 83, 123, 164, 166, 246, 249, 257, 328, 332, 492, 498, 514, 664, 771, 984, 996, 1028, 1542, 1992, 2056, 3084, 3403, 6168, 6806, 10209, 10537, 13612, 20418, 21074, 21331, 27224, 31611, 40836, 42148, 42662, 63222, 63993, 81672, 84296, 85324, 126444, 127986, 170648, 252888, 255972, 511944, 874571, 1749142, 2623713, 3498284, 5247426, 6996568, 10494852, 20989704]

約数ペア:

[(1, 20989704), (2, 10494852), (3, 6996568), (4, 5247426), (6, 3498284), (8, 2623713), (12, 1749142), (24, 874571), (41, 511944), (82, 255972), (83, 252888), (123, 170648), (164, 127986), (166, 126444), (246, 85324), (249, 84296), (257, 81672), (328, 63993), (332, 63222), (492, 42662), (498, 42148), (514, 40836), (664, 31611), (771, 27224), (984, 21331), (996, 21074), (1028, 20418), (1542, 13612), (1992, 10537), (2056, 10209), (3084, 6806), (3403, 6168)]