1661520640

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3221}}^1$

素因数の和:3286

約数の個数: 144

約数和(自身を含む): 4425636096

約数和(自身を除く): 2764115456

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 155, 160, 208, 248, 256, 260, 310, 320, 403, 416, 496, 520, 620, 640, 806, 832, 992, 1040, 1240, 1280, 1612, 1664, 1984, 2015, 2080, 2480, 3221, 3224, 3328, 3968, 4030, 4160, 4960, 6442, 6448, 7936, 8060, 8320, 9920, 12884, 12896, 16105, 16120, 16640, 19840, 25768, 25792, 32210, 32240, 39680, 41873, 51536, 51584, 64420, 64480, 83746, 99851, 103072, 103168, 128840, 128960, 167492, 199702, 206144, 209365, 257680, 257920, 334984, 399404, 412288, 418730, 499255, 515360, 515840, 669968, 798808, 824576, 837460, 998510, 1030720, 1298063, 1339936, 1597616, 1674920, 1997020, 2061440, 2596126, 2679872, 3195232, 3349840, 3994040, 4122880, 5192252, 5359744, 6390464, 6490315, 6699680, 7988080, 10384504, 10719488, 12780928, 12980630, 13399360, 15976160, 20769008, 25561856, 25961260, 26798720, 31952320, 41538016, 51922520, 53597440, 63904640, 83076032, 103845040, 127809280, 166152064, 207690080, 332304128, 415380160, 830760320, 1661520640]

約数ペア:

[(1, 1661520640), (2, 830760320), (4, 415380160), (5, 332304128), (8, 207690080), (10, 166152064), (13, 127809280), (16, 103845040), (20, 83076032), (26, 63904640), (31, 53597440), (32, 51922520), (40, 41538016), (52, 31952320), (62, 26798720), (64, 25961260), (65, 25561856), (80, 20769008), (104, 15976160), (124, 13399360), (128, 12980630), (130, 12780928), (155, 10719488), (160, 10384504), (208, 7988080), (248, 6699680), (256, 6490315), (260, 6390464), (310, 5359744), (320, 5192252), (403, 4122880), (416, 3994040), (496, 3349840), (520, 3195232), (620, 2679872), (640, 2596126), (806, 2061440), (832, 1997020), (992, 1674920), (1040, 1597616), (1240, 1339936), (1280, 1298063), (1612, 1030720), (1664, 998510), (1984, 837460), (2015, 824576), (2080, 798808), (2480, 669968), (3221, 515840), (3224, 515360), (3328, 499255), (3968, 418730), (4030, 412288), (4160, 399404), (4960, 334984), (6442, 257920), (6448, 257680), (7936, 209365), (8060, 206144), (8320, 199702), (9920, 167492), (12884, 128960), (12896, 128840), (16105, 103168), (16120, 103072), (16640, 99851), (19840, 83746), (25768, 64480), (25792, 64420), (32210, 51584), (32240, 51536), (39680, 41873)]