638401920

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25577}}^1$

素因数の和:25612

約数の個数: 128

約数和(自身を含む): 2191523040

約数和(自身を除く): 1553121120

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, 960, 1040, 1248, 1560, 1664, 1920, 2080, 2496, 3120, 4160, 4992, 6240, 8320, 12480, 24960, 25577, 51154, 76731, 102308, 127885, 153462, 204616, 255770, 306924, 332501, 383655, 409232, 511540, 613848, 665002, 767310, 818464, 997503, 1023080, 1227696, 1330004, 1534620, 1636928, 1662505, 1995006, 2046160, 2455392, 2660008, 3069240, 3273856, 3325010, 3990012, 4092320, 4910784, 4987515, 5320016, 6138480, 6650020, 7980024, 8184640, 9821568, 9975030, 10640032, 12276960, 13300040, 15960048, 16369280, 19950060, 21280064, 24553920, 26600080, 31920096, 39900120, 42560128, 49107840, 53200160, 63840192, 79800240, 106400320, 127680384, 159600480, 212800640, 319200960, 638401920]

約数ペア:

[(1, 638401920), (2, 319200960), (3, 212800640), (4, 159600480), (5, 127680384), (6, 106400320), (8, 79800240), (10, 63840192), (12, 53200160), (13, 49107840), (15, 42560128), (16, 39900120), (20, 31920096), (24, 26600080), (26, 24553920), (30, 21280064), (32, 19950060), (39, 16369280), (40, 15960048), (48, 13300040), (52, 12276960), (60, 10640032), (64, 9975030), (65, 9821568), (78, 8184640), (80, 7980024), (96, 6650020), (104, 6138480), (120, 5320016), (128, 4987515), (130, 4910784), (156, 4092320), (160, 3990012), (192, 3325010), (195, 3273856), (208, 3069240), (240, 2660008), (260, 2455392), (312, 2046160), (320, 1995006), (384, 1662505), (390, 1636928), (416, 1534620), (480, 1330004), (520, 1227696), (624, 1023080), (640, 997503), (780, 818464), (832, 767310), (960, 665002), (1040, 613848), (1248, 511540), (1560, 409232), (1664, 383655), (1920, 332501), (2080, 306924), (2496, 255770), (3120, 204616), (4160, 153462), (4992, 127885), (6240, 102308), (8320, 76731), (12480, 51154), (24960, 25577)]