20005328

素因数分解:

$2^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 50889600

約数和(自身を除く): 30884272

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 19, 28, 34, 38, 49, 56, 68, 76, 79, 98, 112, 119, 133, 136, 152, 158, 196, 238, 266, 272, 304, 316, 323, 392, 476, 532, 553, 632, 646, 784, 833, 931, 952, 1064, 1106, 1264, 1292, 1343, 1501, 1666, 1862, 1904, 2128, 2212, 2261, 2584, 2686, 3002, 3332, 3724, 3871, 4424, 4522, 5168, 5372, 6004, 6664, 7448, 7742, 8848, 9044, 9401, 10507, 10744, 12008, 13328, 14896, 15484, 15827, 18088, 18802, 21014, 21488, 24016, 25517, 30968, 31654, 36176, 37604, 42028, 51034, 61936, 63308, 65807, 73549, 75208, 84056, 102068, 126616, 131614, 147098, 150416, 168112, 178619, 204136, 253232, 263228, 294196, 357238, 408272, 526456, 588392, 714476, 1052912, 1176784, 1250333, 1428952, 2500666, 2857904, 5001332, 10002664, 20005328]

約数ペア:

[(1, 20005328), (2, 10002664), (4, 5001332), (7, 2857904), (8, 2500666), (14, 1428952), (16, 1250333), (17, 1176784), (19, 1052912), (28, 714476), (34, 588392), (38, 526456), (49, 408272), (56, 357238), (68, 294196), (76, 263228), (79, 253232), (98, 204136), (112, 178619), (119, 168112), (133, 150416), (136, 147098), (152, 131614), (158, 126616), (196, 102068), (238, 84056), (266, 75208), (272, 73549), (304, 65807), (316, 63308), (323, 61936), (392, 51034), (476, 42028), (532, 37604), (553, 36176), (632, 31654), (646, 30968), (784, 25517), (833, 24016), (931, 21488), (952, 21014), (1064, 18802), (1106, 18088), (1264, 15827), (1292, 15484), (1343, 14896), (1501, 13328), (1666, 12008), (1862, 10744), (1904, 10507), (2128, 9401), (2212, 9044), (2261, 8848), (2584, 7742), (2686, 7448), (3002, 6664), (3332, 6004), (3724, 5372), (3871, 5168), (4424, 4522)]