21139840

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:132

約数の個数: 128

約数和(自身を含む): 56181600

約数和(自身を除く): 35041760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 29, 32, 34, 40, 58, 64, 67, 68, 80, 85, 116, 128, 134, 136, 145, 160, 170, 232, 268, 272, 290, 320, 335, 340, 464, 493, 536, 544, 580, 640, 670, 680, 928, 986, 1072, 1088, 1139, 1160, 1340, 1360, 1856, 1943, 1972, 2144, 2176, 2278, 2320, 2465, 2680, 2720, 3712, 3886, 3944, 4288, 4556, 4640, 4930, 5360, 5440, 5695, 7772, 7888, 8576, 9112, 9280, 9715, 9860, 10720, 10880, 11390, 15544, 15776, 18224, 18560, 19430, 19720, 21440, 22780, 31088, 31552, 33031, 36448, 38860, 39440, 42880, 45560, 62176, 63104, 66062, 72896, 77720, 78880, 91120, 124352, 132124, 145792, 155440, 157760, 165155, 182240, 248704, 264248, 310880, 315520, 330310, 364480, 528496, 621760, 660620, 728960, 1056992, 1243520, 1321240, 2113984, 2642480, 4227968, 5284960, 10569920, 21139840]

約数ペア:

[(1, 21139840), (2, 10569920), (4, 5284960), (5, 4227968), (8, 2642480), (10, 2113984), (16, 1321240), (17, 1243520), (20, 1056992), (29, 728960), (32, 660620), (34, 621760), (40, 528496), (58, 364480), (64, 330310), (67, 315520), (68, 310880), (80, 264248), (85, 248704), (116, 182240), (128, 165155), (134, 157760), (136, 155440), (145, 145792), (160, 132124), (170, 124352), (232, 91120), (268, 78880), (272, 77720), (290, 72896), (320, 66062), (335, 63104), (340, 62176), (464, 45560), (493, 42880), (536, 39440), (544, 38860), (580, 36448), (640, 33031), (670, 31552), (680, 31088), (928, 22780), (986, 21440), (1072, 19720), (1088, 19430), (1139, 18560), (1160, 18224), (1340, 15776), (1360, 15544), (1856, 11390), (1943, 10880), (1972, 10720), (2144, 9860), (2176, 9715), (2278, 9280), (2320, 9112), (2465, 8576), (2680, 7888), (2720, 7772), (3712, 5695), (3886, 5440), (3944, 5360), (4288, 4930), (4556, 4640)]