21989760

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{881}}^1$

素因数の和:916

約数の個数: 128

約数和(自身を含む): 75569760

約数和(自身を除く): 53580000

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, 881, 960, 1040, 1248, 1560, 1664, 1762, 1920, 2080, 2496, 2643, 3120, 3524, 4160, 4405, 4992, 5286, 6240, 7048, 8320, 8810, 10572, 11453, 12480, 13215, 14096, 17620, 21144, 22906, 24960, 26430, 28192, 34359, 35240, 42288, 45812, 52860, 56384, 57265, 68718, 70480, 84576, 91624, 105720, 112768, 114530, 137436, 140960, 169152, 171795, 183248, 211440, 229060, 274872, 281920, 338304, 343590, 366496, 422880, 458120, 549744, 563840, 687180, 732992, 845760, 916240, 1099488, 1374360, 1465984, 1691520, 1832480, 2198976, 2748720, 3664960, 4397952, 5497440, 7329920, 10994880, 21989760]

約数ペア:

[(1, 21989760), (2, 10994880), (3, 7329920), (4, 5497440), (5, 4397952), (6, 3664960), (8, 2748720), (10, 2198976), (12, 1832480), (13, 1691520), (15, 1465984), (16, 1374360), (20, 1099488), (24, 916240), (26, 845760), (30, 732992), (32, 687180), (39, 563840), (40, 549744), (48, 458120), (52, 422880), (60, 366496), (64, 343590), (65, 338304), (78, 281920), (80, 274872), (96, 229060), (104, 211440), (120, 183248), (128, 171795), (130, 169152), (156, 140960), (160, 137436), (192, 114530), (195, 112768), (208, 105720), (240, 91624), (260, 84576), (312, 70480), (320, 68718), (384, 57265), (390, 56384), (416, 52860), (480, 45812), (520, 42288), (624, 35240), (640, 34359), (780, 28192), (832, 26430), (881, 24960), (960, 22906), (1040, 21144), (1248, 17620), (1560, 14096), (1664, 13215), (1762, 12480), (1920, 11453), (2080, 10572), (2496, 8810), (2643, 8320), (3120, 7048), (3524, 6240), (4160, 5286), (4405, 4992)]