20787984

素因数分解:

$2^4\times 3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{503}}^1$

素因数の和:565

約数の個数: 120

約数和(自身を含む): 68245632

約数和(自身を除く): 47457648

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 36, 41, 42, 48, 56, 63, 72, 82, 84, 112, 123, 126, 144, 164, 168, 246, 252, 287, 328, 336, 369, 492, 503, 504, 574, 656, 738, 861, 984, 1006, 1008, 1148, 1476, 1509, 1722, 1968, 2012, 2296, 2583, 2952, 3018, 3444, 3521, 4024, 4527, 4592, 5166, 5904, 6036, 6888, 7042, 8048, 9054, 10332, 10563, 12072, 13776, 14084, 18108, 20623, 20664, 21126, 24144, 28168, 31689, 36216, 41246, 41328, 42252, 56336, 61869, 63378, 72432, 82492, 84504, 123738, 126756, 144361, 164984, 169008, 185607, 247476, 253512, 288722, 329968, 371214, 433083, 494952, 507024, 577444, 742428, 866166, 989904, 1154888, 1299249, 1484856, 1732332, 2309776, 2598498, 2969712, 3464664, 5196996, 6929328, 10393992, 20787984]

約数ペア:

[(1, 20787984), (2, 10393992), (3, 6929328), (4, 5196996), (6, 3464664), (7, 2969712), (8, 2598498), (9, 2309776), (12, 1732332), (14, 1484856), (16, 1299249), (18, 1154888), (21, 989904), (24, 866166), (28, 742428), (36, 577444), (41, 507024), (42, 494952), (48, 433083), (56, 371214), (63, 329968), (72, 288722), (82, 253512), (84, 247476), (112, 185607), (123, 169008), (126, 164984), (144, 144361), (164, 126756), (168, 123738), (246, 84504), (252, 82492), (287, 72432), (328, 63378), (336, 61869), (369, 56336), (492, 42252), (503, 41328), (504, 41246), (574, 36216), (656, 31689), (738, 28168), (861, 24144), (984, 21126), (1006, 20664), (1008, 20623), (1148, 18108), (1476, 14084), (1509, 13776), (1722, 12072), (1968, 10563), (2012, 10332), (2296, 9054), (2583, 8048), (2952, 7042), (3018, 6888), (3444, 6036), (3521, 5904), (4024, 5166), (4527, 4592)]