21981115968

素因数分解:

$2^6\times 3^1\times 7^1\times {\mathrm{1987}}^1\times {\mathrm{8231}}^1$

素因数の和:10240

約数の個数: 112

約数和(自身を含む): 66508237824

約数和(自身を除く): 44527121856

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 64, 84, 96, 112, 168, 192, 224, 336, 448, 672, 1344, 1987, 3974, 5961, 7948, 8231, 11922, 13909, 15896, 16462, 23844, 24693, 27818, 31792, 32924, 41727, 47688, 49386, 55636, 57617, 63584, 65848, 83454, 95376, 98772, 111272, 115234, 127168, 131696, 166908, 172851, 190752, 197544, 222544, 230468, 263392, 333816, 345702, 381504, 395088, 445088, 460936, 526784, 667632, 691404, 790176, 890176, 921872, 1335264, 1382808, 1580352, 1843744, 2670528, 2765616, 3687488, 5531232, 11062464, 16354997, 32709994, 49064991, 65419988, 98129982, 114484979, 130839976, 196259964, 228969958, 261679952, 343454937, 392519928, 457939916, 523359904, 686909874, 785039856, 915879832, 1046719808, 1373819748, 1570079712, 1831759664, 2747639496, 3140159424, 3663519328, 5495278992, 7327038656, 10990557984, 21981115968]

約数ペア:

[(1, 21981115968), (2, 10990557984), (3, 7327038656), (4, 5495278992), (6, 3663519328), (7, 3140159424), (8, 2747639496), (12, 1831759664), (14, 1570079712), (16, 1373819748), (21, 1046719808), (24, 915879832), (28, 785039856), (32, 686909874), (42, 523359904), (48, 457939916), (56, 392519928), (64, 343454937), (84, 261679952), (96, 228969958), (112, 196259964), (168, 130839976), (192, 114484979), (224, 98129982), (336, 65419988), (448, 49064991), (672, 32709994), (1344, 16354997), (1987, 11062464), (3974, 5531232), (5961, 3687488), (7948, 2765616), (8231, 2670528), (11922, 1843744), (13909, 1580352), (15896, 1382808), (16462, 1335264), (23844, 921872), (24693, 890176), (27818, 790176), (31792, 691404), (32924, 667632), (41727, 526784), (47688, 460936), (49386, 445088), (55636, 395088), (57617, 381504), (63584, 345702), (65848, 333816), (83454, 263392), (95376, 230468), (98772, 222544), (111272, 197544), (115234, 190752), (127168, 172851), (131696, 166908)]