20978568

素因数分解:

$2^3\times 3^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:300

約数の個数: 128

約数和(自身を含む): 65049600

約数和(自身を除く): 44071032

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 27, 31, 36, 39, 52, 54, 62, 72, 78, 93, 104, 108, 117, 124, 156, 186, 216, 234, 241, 248, 279, 312, 351, 372, 403, 468, 482, 558, 702, 723, 744, 806, 837, 936, 964, 1116, 1209, 1404, 1446, 1612, 1674, 1928, 2169, 2232, 2418, 2808, 2892, 3133, 3224, 3348, 3627, 4338, 4836, 5784, 6266, 6507, 6696, 7254, 7471, 8676, 9399, 9672, 10881, 12532, 13014, 14508, 14942, 17352, 18798, 21762, 22413, 25064, 26028, 28197, 29016, 29884, 37596, 43524, 44826, 52056, 56394, 59768, 67239, 75192, 84591, 87048, 89652, 97123, 112788, 134478, 169182, 179304, 194246, 201717, 225576, 268956, 291369, 338364, 388492, 403434, 537912, 582738, 676728, 776984, 806868, 874107, 1165476, 1613736, 1748214, 2330952, 2622321, 3496428, 5244642, 6992856, 10489284, 20978568]

約数ペア:

[(1, 20978568), (2, 10489284), (3, 6992856), (4, 5244642), (6, 3496428), (8, 2622321), (9, 2330952), (12, 1748214), (13, 1613736), (18, 1165476), (24, 874107), (26, 806868), (27, 776984), (31, 676728), (36, 582738), (39, 537912), (52, 403434), (54, 388492), (62, 338364), (72, 291369), (78, 268956), (93, 225576), (104, 201717), (108, 194246), (117, 179304), (124, 169182), (156, 134478), (186, 112788), (216, 97123), (234, 89652), (241, 87048), (248, 84591), (279, 75192), (312, 67239), (351, 59768), (372, 56394), (403, 52056), (468, 44826), (482, 43524), (558, 37596), (702, 29884), (723, 29016), (744, 28197), (806, 26028), (837, 25064), (936, 22413), (964, 21762), (1116, 18798), (1209, 17352), (1404, 14942), (1446, 14508), (1612, 13014), (1674, 12532), (1928, 10881), (2169, 9672), (2232, 9399), (2418, 8676), (2808, 7471), (2892, 7254), (3133, 6696), (3224, 6507), (3348, 6266), (3627, 5784), (4338, 4836)]