20911716

素因数分解:

$2^2\times 3^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:358

約数の個数: 96

約数和(自身を含む): 62720000

約数和(自身を除く): 41808284

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 139, 189, 199, 252, 278, 378, 398, 417, 556, 597, 756, 796, 834, 973, 1194, 1251, 1393, 1668, 1791, 1946, 2388, 2502, 2786, 2919, 3582, 3753, 3892, 4179, 5004, 5373, 5572, 5838, 7164, 7506, 8358, 8757, 10746, 11676, 12537, 15012, 16716, 17514, 21492, 25074, 26271, 27661, 35028, 37611, 50148, 52542, 55322, 75222, 82983, 105084, 110644, 150444, 165966, 193627, 248949, 331932, 387254, 497898, 580881, 746847, 774508, 995796, 1161762, 1493694, 1742643, 2323524, 2987388, 3485286, 5227929, 6970572, 10455858, 20911716]

約数ペア:

[(1, 20911716), (2, 10455858), (3, 6970572), (4, 5227929), (6, 3485286), (7, 2987388), (9, 2323524), (12, 1742643), (14, 1493694), (18, 1161762), (21, 995796), (27, 774508), (28, 746847), (36, 580881), (42, 497898), (54, 387254), (63, 331932), (84, 248949), (108, 193627), (126, 165966), (139, 150444), (189, 110644), (199, 105084), (252, 82983), (278, 75222), (378, 55322), (398, 52542), (417, 50148), (556, 37611), (597, 35028), (756, 27661), (796, 26271), (834, 25074), (973, 21492), (1194, 17514), (1251, 16716), (1393, 15012), (1668, 12537), (1791, 11676), (1946, 10746), (2388, 8757), (2502, 8358), (2786, 7506), (2919, 7164), (3582, 5838), (3753, 5572), (3892, 5373), (4179, 5004)]