20400480

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:509

約数の個数: 144

約数和(自身を含む): 72019584

約数和(自身を除く): 51619104

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 31, 32, 36, 40, 45, 48, 60, 62, 72, 80, 90, 93, 96, 120, 124, 144, 155, 160, 180, 186, 240, 248, 279, 288, 310, 360, 372, 457, 465, 480, 496, 558, 620, 720, 744, 914, 930, 992, 1116, 1240, 1371, 1395, 1440, 1488, 1828, 1860, 2232, 2285, 2480, 2742, 2790, 2976, 3656, 3720, 4113, 4464, 4570, 4960, 5484, 5580, 6855, 7312, 7440, 8226, 8928, 9140, 10968, 11160, 13710, 14167, 14624, 14880, 16452, 18280, 20565, 21936, 22320, 27420, 28334, 32904, 36560, 41130, 42501, 43872, 44640, 54840, 56668, 65808, 70835, 73120, 82260, 85002, 109680, 113336, 127503, 131616, 141670, 164520, 170004, 212505, 219360, 226672, 255006, 283340, 329040, 340008, 425010, 453344, 510012, 566680, 637515, 658080, 680016, 850020, 1020024, 1133360, 1275030, 1360032, 1700040, 2040048, 2266720, 2550060, 3400080, 4080096, 5100120, 6800160, 10200240, 20400480]

約数ペア:

[(1, 20400480), (2, 10200240), (3, 6800160), (4, 5100120), (5, 4080096), (6, 3400080), (8, 2550060), (9, 2266720), (10, 2040048), (12, 1700040), (15, 1360032), (16, 1275030), (18, 1133360), (20, 1020024), (24, 850020), (30, 680016), (31, 658080), (32, 637515), (36, 566680), (40, 510012), (45, 453344), (48, 425010), (60, 340008), (62, 329040), (72, 283340), (80, 255006), (90, 226672), (93, 219360), (96, 212505), (120, 170004), (124, 164520), (144, 141670), (155, 131616), (160, 127503), (180, 113336), (186, 109680), (240, 85002), (248, 82260), (279, 73120), (288, 70835), (310, 65808), (360, 56668), (372, 54840), (457, 44640), (465, 43872), (480, 42501), (496, 41130), (558, 36560), (620, 32904), (720, 28334), (744, 27420), (914, 22320), (930, 21936), (992, 20565), (1116, 18280), (1240, 16452), (1371, 14880), (1395, 14624), (1440, 14167), (1488, 13710), (1828, 11160), (1860, 10968), (2232, 9140), (2285, 8928), (2480, 8226), (2742, 7440), (2790, 7312), (2976, 6855), (3656, 5580), (3720, 5484), (4113, 4960), (4464, 4570)]