20663840

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:210

約数の個数: 96

約数和(自身を含む): 52907904

約数和(自身を除く): 32244064

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 71, 80, 85, 107, 136, 142, 160, 170, 214, 272, 284, 340, 355, 428, 535, 544, 568, 680, 710, 856, 1070, 1136, 1207, 1360, 1420, 1712, 1819, 2140, 2272, 2414, 2720, 2840, 3424, 3638, 4280, 4828, 5680, 6035, 7276, 7597, 8560, 9095, 9656, 11360, 12070, 14552, 15194, 17120, 18190, 19312, 24140, 29104, 30388, 36380, 37985, 38624, 48280, 58208, 60776, 72760, 75970, 96560, 121552, 129149, 145520, 151940, 193120, 243104, 258298, 291040, 303880, 516596, 607760, 645745, 1033192, 1215520, 1291490, 2066384, 2582980, 4132768, 5165960, 10331920, 20663840]

約数ペア:

[(1, 20663840), (2, 10331920), (4, 5165960), (5, 4132768), (8, 2582980), (10, 2066384), (16, 1291490), (17, 1215520), (20, 1033192), (32, 645745), (34, 607760), (40, 516596), (68, 303880), (71, 291040), (80, 258298), (85, 243104), (107, 193120), (136, 151940), (142, 145520), (160, 129149), (170, 121552), (214, 96560), (272, 75970), (284, 72760), (340, 60776), (355, 58208), (428, 48280), (535, 38624), (544, 37985), (568, 36380), (680, 30388), (710, 29104), (856, 24140), (1070, 19312), (1136, 18190), (1207, 17120), (1360, 15194), (1420, 14552), (1712, 12070), (1819, 11360), (2140, 9656), (2272, 9095), (2414, 8560), (2720, 7597), (2840, 7276), (3424, 6035), (3638, 5680), (4280, 4828)]