81439840

素因数分解:

$2^5\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:260

約数の個数: 96

約数和(自身を含む): 199874304

約数和(自身を除く): 118434464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 67, 71, 80, 107, 134, 142, 160, 214, 268, 284, 335, 355, 428, 535, 536, 568, 670, 710, 856, 1070, 1072, 1136, 1340, 1420, 1712, 2140, 2144, 2272, 2680, 2840, 3424, 4280, 4757, 5360, 5680, 7169, 7597, 8560, 9514, 10720, 11360, 14338, 15194, 17120, 19028, 23785, 28676, 30388, 35845, 37985, 38056, 47570, 57352, 60776, 71690, 75970, 76112, 95140, 114704, 121552, 143380, 151940, 152224, 190280, 229408, 243104, 286760, 303880, 380560, 508999, 573520, 607760, 761120, 1017998, 1147040, 1215520, 2035996, 2544995, 4071992, 5089990, 8143984, 10179980, 16287968, 20359960, 40719920, 81439840]

約数ペア:

[(1, 81439840), (2, 40719920), (4, 20359960), (5, 16287968), (8, 10179980), (10, 8143984), (16, 5089990), (20, 4071992), (32, 2544995), (40, 2035996), (67, 1215520), (71, 1147040), (80, 1017998), (107, 761120), (134, 607760), (142, 573520), (160, 508999), (214, 380560), (268, 303880), (284, 286760), (335, 243104), (355, 229408), (428, 190280), (535, 152224), (536, 151940), (568, 143380), (670, 121552), (710, 114704), (856, 95140), (1070, 76112), (1072, 75970), (1136, 71690), (1340, 60776), (1420, 57352), (1712, 47570), (2140, 38056), (2144, 37985), (2272, 35845), (2680, 30388), (2840, 28676), (3424, 23785), (4280, 19028), (4757, 17120), (5360, 15194), (5680, 14338), (7169, 11360), (7597, 10720), (8560, 9514)]