31871840

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:245

約数の個数: 192

約数和(自身を含む): 101606400

約数和(自身を除く): 69734560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 32, 35, 40, 44, 52, 55, 56, 65, 70, 77, 80, 88, 91, 104, 110, 112, 130, 140, 143, 154, 160, 176, 182, 199, 208, 220, 224, 260, 280, 286, 308, 352, 364, 385, 398, 416, 440, 455, 520, 560, 572, 616, 715, 728, 770, 796, 880, 910, 995, 1001, 1040, 1120, 1144, 1232, 1393, 1430, 1456, 1540, 1592, 1760, 1820, 1990, 2002, 2080, 2189, 2288, 2464, 2587, 2786, 2860, 2912, 3080, 3184, 3640, 3980, 4004, 4378, 4576, 5005, 5174, 5572, 5720, 6160, 6368, 6965, 7280, 7960, 8008, 8756, 10010, 10348, 10945, 11144, 11440, 12320, 12935, 13930, 14560, 15323, 15920, 16016, 17512, 18109, 20020, 20696, 21890, 22288, 22880, 25870, 27860, 28457, 30646, 31840, 32032, 35024, 36218, 40040, 41392, 43780, 44576, 51740, 55720, 56914, 61292, 70048, 72436, 76615, 80080, 82784, 87560, 90545, 103480, 111440, 113828, 122584, 142285, 144872, 153230, 160160, 175120, 181090, 199199, 206960, 222880, 227656, 245168, 284570, 289744, 306460, 350240, 362180, 398398, 413920, 455312, 490336, 569140, 579488, 612920, 724360, 796796, 910624, 995995, 1138280, 1225840, 1448720, 1593592, 1991990, 2276560, 2451680, 2897440, 3187184, 3983980, 4553120, 6374368, 7967960, 15935920, 31871840]

約数ペア:

[(1, 31871840), (2, 15935920), (4, 7967960), (5, 6374368), (7, 4553120), (8, 3983980), (10, 3187184), (11, 2897440), (13, 2451680), (14, 2276560), (16, 1991990), (20, 1593592), (22, 1448720), (26, 1225840), (28, 1138280), (32, 995995), (35, 910624), (40, 796796), (44, 724360), (52, 612920), (55, 579488), (56, 569140), (65, 490336), (70, 455312), (77, 413920), (80, 398398), (88, 362180), (91, 350240), (104, 306460), (110, 289744), (112, 284570), (130, 245168), (140, 227656), (143, 222880), (154, 206960), (160, 199199), (176, 181090), (182, 175120), (199, 160160), (208, 153230), (220, 144872), (224, 142285), (260, 122584), (280, 113828), (286, 111440), (308, 103480), (352, 90545), (364, 87560), (385, 82784), (398, 80080), (416, 76615), (440, 72436), (455, 70048), (520, 61292), (560, 56914), (572, 55720), (616, 51740), (715, 44576), (728, 43780), (770, 41392), (796, 40040), (880, 36218), (910, 35024), (995, 32032), (1001, 31840), (1040, 30646), (1120, 28457), (1144, 27860), (1232, 25870), (1393, 22880), (1430, 22288), (1456, 21890), (1540, 20696), (1592, 20020), (1760, 18109), (1820, 17512), (1990, 16016), (2002, 15920), (2080, 15323), (2189, 14560), (2288, 13930), (2464, 12935), (2587, 12320), (2786, 11440), (2860, 11144), (2912, 10945), (3080, 10348), (3184, 10010), (3640, 8756), (3980, 8008), (4004, 7960), (4378, 7280), (4576, 6965), (5005, 6368), (5174, 6160), (5572, 5720)]