20400660

素因数分解:

$2^2\times 3^4\times 5^1\times 7^2\times {\mathrm{257}}^1$

素因数の和:292

約数の個数: 180

約数和(自身を含む): 74735892

約数和(自身を除く): 54335232

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 49, 54, 60, 63, 70, 81, 84, 90, 98, 105, 108, 126, 135, 140, 147, 162, 180, 189, 196, 210, 245, 252, 257, 270, 294, 315, 324, 378, 405, 420, 441, 490, 514, 540, 567, 588, 630, 735, 756, 771, 810, 882, 945, 980, 1028, 1134, 1260, 1285, 1323, 1470, 1542, 1620, 1764, 1799, 1890, 2205, 2268, 2313, 2570, 2646, 2835, 2940, 3084, 3598, 3780, 3855, 3969, 4410, 4626, 5140, 5292, 5397, 5670, 6615, 6939, 7196, 7710, 7938, 8820, 8995, 9252, 10794, 11340, 11565, 12593, 13230, 13878, 15420, 15876, 16191, 17990, 19845, 20817, 21588, 23130, 25186, 26460, 26985, 27756, 32382, 34695, 35980, 37779, 39690, 41634, 46260, 48573, 50372, 53970, 62965, 64764, 69390, 75558, 79380, 80955, 83268, 97146, 104085, 107940, 113337, 125930, 138780, 145719, 151116, 161910, 188895, 194292, 208170, 226674, 242865, 251860, 291438, 323820, 340011, 377790, 416340, 453348, 485730, 566685, 582876, 680022, 728595, 755580, 971460, 1020033, 1133370, 1360044, 1457190, 1700055, 2040066, 2266740, 2914380, 3400110, 4080132, 5100165, 6800220, 10200330, 20400660]

約数ペア:

[(1, 20400660), (2, 10200330), (3, 6800220), (4, 5100165), (5, 4080132), (6, 3400110), (7, 2914380), (9, 2266740), (10, 2040066), (12, 1700055), (14, 1457190), (15, 1360044), (18, 1133370), (20, 1020033), (21, 971460), (27, 755580), (28, 728595), (30, 680022), (35, 582876), (36, 566685), (42, 485730), (45, 453348), (49, 416340), (54, 377790), (60, 340011), (63, 323820), (70, 291438), (81, 251860), (84, 242865), (90, 226674), (98, 208170), (105, 194292), (108, 188895), (126, 161910), (135, 151116), (140, 145719), (147, 138780), (162, 125930), (180, 113337), (189, 107940), (196, 104085), (210, 97146), (245, 83268), (252, 80955), (257, 79380), (270, 75558), (294, 69390), (315, 64764), (324, 62965), (378, 53970), (405, 50372), (420, 48573), (441, 46260), (490, 41634), (514, 39690), (540, 37779), (567, 35980), (588, 34695), (630, 32382), (735, 27756), (756, 26985), (771, 26460), (810, 25186), (882, 23130), (945, 21588), (980, 20817), (1028, 19845), (1134, 17990), (1260, 16191), (1285, 15876), (1323, 15420), (1470, 13878), (1542, 13230), (1620, 12593), (1764, 11565), (1799, 11340), (1890, 10794), (2205, 9252), (2268, 8995), (2313, 8820), (2570, 7938), (2646, 7710), (2835, 7196), (2940, 6939), (3084, 6615), (3598, 5670), (3780, 5397), (3855, 5292), (3969, 5140), (4410, 4626)]