20783280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:251

約数の個数: 160

約数和(自身を含む): 74995200

約数和(自身を除く): 54211920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 89, 105, 112, 120, 139, 140, 168, 178, 210, 240, 267, 278, 280, 336, 356, 417, 420, 445, 534, 556, 560, 623, 695, 712, 834, 840, 890, 973, 1068, 1112, 1246, 1335, 1390, 1424, 1668, 1680, 1780, 1869, 1946, 2085, 2136, 2224, 2492, 2670, 2780, 2919, 3115, 3336, 3560, 3738, 3892, 4170, 4272, 4865, 4984, 5340, 5560, 5838, 6230, 6672, 7120, 7476, 7784, 8340, 9345, 9730, 9968, 10680, 11120, 11676, 12371, 12460, 14595, 14952, 15568, 16680, 18690, 19460, 21360, 23352, 24742, 24920, 29190, 29904, 33360, 37113, 37380, 38920, 46704, 49484, 49840, 58380, 61855, 74226, 74760, 77840, 86597, 98968, 116760, 123710, 148452, 149520, 173194, 185565, 197936, 233520, 247420, 259791, 296904, 346388, 371130, 432985, 494840, 519582, 593808, 692776, 742260, 865970, 989680, 1039164, 1298955, 1385552, 1484520, 1731940, 2078328, 2597910, 2969040, 3463880, 4156656, 5195820, 6927760, 10391640, 20783280]

約数ペア:

[(1, 20783280), (2, 10391640), (3, 6927760), (4, 5195820), (5, 4156656), (6, 3463880), (7, 2969040), (8, 2597910), (10, 2078328), (12, 1731940), (14, 1484520), (15, 1385552), (16, 1298955), (20, 1039164), (21, 989680), (24, 865970), (28, 742260), (30, 692776), (35, 593808), (40, 519582), (42, 494840), (48, 432985), (56, 371130), (60, 346388), (70, 296904), (80, 259791), (84, 247420), (89, 233520), (105, 197936), (112, 185565), (120, 173194), (139, 149520), (140, 148452), (168, 123710), (178, 116760), (210, 98968), (240, 86597), (267, 77840), (278, 74760), (280, 74226), (336, 61855), (356, 58380), (417, 49840), (420, 49484), (445, 46704), (534, 38920), (556, 37380), (560, 37113), (623, 33360), (695, 29904), (712, 29190), (834, 24920), (840, 24742), (890, 23352), (973, 21360), (1068, 19460), (1112, 18690), (1246, 16680), (1335, 15568), (1390, 14952), (1424, 14595), (1668, 12460), (1680, 12371), (1780, 11676), (1869, 11120), (1946, 10680), (2085, 9968), (2136, 9730), (2224, 9345), (2492, 8340), (2670, 7784), (2780, 7476), (2919, 7120), (3115, 6672), (3336, 6230), (3560, 5838), (3738, 5560), (3892, 5340), (4170, 4984), (4272, 4865)]