87800020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:182

約数の個数: 144

約数和(自身を含む): 238097664

約数和(自身を除く): 150297644

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 71, 73, 77, 110, 121, 140, 142, 146, 154, 220, 242, 284, 292, 308, 355, 365, 385, 484, 497, 511, 605, 710, 730, 770, 781, 803, 847, 994, 1022, 1210, 1420, 1460, 1540, 1562, 1606, 1694, 1988, 2044, 2420, 2485, 2555, 3124, 3212, 3388, 3905, 4015, 4235, 4970, 5110, 5183, 5467, 5621, 7810, 8030, 8470, 8591, 8833, 9940, 10220, 10366, 10934, 11242, 15620, 16060, 16940, 17182, 17666, 20732, 21868, 22484, 25915, 27335, 28105, 34364, 35332, 36281, 42955, 44165, 51830, 54670, 56210, 57013, 60137, 61831, 72562, 85910, 88330, 103660, 109340, 112420, 114026, 120274, 123662, 145124, 171820, 176660, 181405, 228052, 240548, 247324, 285065, 300685, 309155, 362810, 399091, 570130, 601370, 618310, 627143, 725620, 798182, 1140260, 1202740, 1236620, 1254286, 1596364, 1995455, 2508572, 3135715, 3990910, 4390001, 6271430, 7981820, 8780002, 12542860, 17560004, 21950005, 43900010, 87800020]

約数ペア:

[(1, 87800020), (2, 43900010), (4, 21950005), (5, 17560004), (7, 12542860), (10, 8780002), (11, 7981820), (14, 6271430), (20, 4390001), (22, 3990910), (28, 3135715), (35, 2508572), (44, 1995455), (55, 1596364), (70, 1254286), (71, 1236620), (73, 1202740), (77, 1140260), (110, 798182), (121, 725620), (140, 627143), (142, 618310), (146, 601370), (154, 570130), (220, 399091), (242, 362810), (284, 309155), (292, 300685), (308, 285065), (355, 247324), (365, 240548), (385, 228052), (484, 181405), (497, 176660), (511, 171820), (605, 145124), (710, 123662), (730, 120274), (770, 114026), (781, 112420), (803, 109340), (847, 103660), (994, 88330), (1022, 85910), (1210, 72562), (1420, 61831), (1460, 60137), (1540, 57013), (1562, 56210), (1606, 54670), (1694, 51830), (1988, 44165), (2044, 42955), (2420, 36281), (2485, 35332), (2555, 34364), (3124, 28105), (3212, 27335), (3388, 25915), (3905, 22484), (4015, 21868), (4235, 20732), (4970, 17666), (5110, 17182), (5183, 16940), (5467, 16060), (5621, 15620), (7810, 11242), (8030, 10934), (8470, 10366), (8591, 10220), (8833, 9940)]