20941440

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{839}}^1$

素因数の和:874

約数の個数: 128

約数和(自身を含む): 71971200

約数和(自身を除く): 51029760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 384, 390, 416, 480, 520, 624, 640, 780, 832, 839, 960, 1040, 1248, 1560, 1664, 1678, 1920, 2080, 2496, 2517, 3120, 3356, 4160, 4195, 4992, 5034, 6240, 6712, 8320, 8390, 10068, 10907, 12480, 12585, 13424, 16780, 20136, 21814, 24960, 25170, 26848, 32721, 33560, 40272, 43628, 50340, 53696, 54535, 65442, 67120, 80544, 87256, 100680, 107392, 109070, 130884, 134240, 161088, 163605, 174512, 201360, 218140, 261768, 268480, 322176, 327210, 349024, 402720, 436280, 523536, 536960, 654420, 698048, 805440, 872560, 1047072, 1308840, 1396096, 1610880, 1745120, 2094144, 2617680, 3490240, 4188288, 5235360, 6980480, 10470720, 20941440]

約数ペア:

[(1, 20941440), (2, 10470720), (3, 6980480), (4, 5235360), (5, 4188288), (6, 3490240), (8, 2617680), (10, 2094144), (12, 1745120), (13, 1610880), (15, 1396096), (16, 1308840), (20, 1047072), (24, 872560), (26, 805440), (30, 698048), (32, 654420), (39, 536960), (40, 523536), (48, 436280), (52, 402720), (60, 349024), (64, 327210), (65, 322176), (78, 268480), (80, 261768), (96, 218140), (104, 201360), (120, 174512), (128, 163605), (130, 161088), (156, 134240), (160, 130884), (192, 109070), (195, 107392), (208, 100680), (240, 87256), (260, 80544), (312, 67120), (320, 65442), (384, 54535), (390, 53696), (416, 50340), (480, 43628), (520, 40272), (624, 33560), (640, 32721), (780, 26848), (832, 25170), (839, 24960), (960, 21814), (1040, 20136), (1248, 16780), (1560, 13424), (1664, 12585), (1678, 12480), (1920, 10907), (2080, 10068), (2496, 8390), (2517, 8320), (3120, 6712), (3356, 6240), (4160, 5034), (4195, 4992)]