20215888

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:356

約数の個数: 80

約数和(自身を含む): 49818240

約数和(自身を除く): 29602352

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 61, 77, 88, 112, 122, 154, 176, 244, 269, 308, 427, 488, 538, 616, 671, 854, 976, 1076, 1232, 1342, 1708, 1883, 2152, 2684, 2959, 3416, 3766, 4304, 4697, 5368, 5918, 6832, 7532, 9394, 10736, 11836, 15064, 16409, 18788, 20713, 23672, 30128, 32818, 37576, 41426, 47344, 65636, 75152, 82852, 114863, 131272, 165704, 180499, 229726, 262544, 331408, 360998, 459452, 721996, 918904, 1263493, 1443992, 1837808, 2526986, 2887984, 5053972, 10107944, 20215888]

約数ペア:

[(1, 20215888), (2, 10107944), (4, 5053972), (7, 2887984), (8, 2526986), (11, 1837808), (14, 1443992), (16, 1263493), (22, 918904), (28, 721996), (44, 459452), (56, 360998), (61, 331408), (77, 262544), (88, 229726), (112, 180499), (122, 165704), (154, 131272), (176, 114863), (244, 82852), (269, 75152), (308, 65636), (427, 47344), (488, 41426), (538, 37576), (616, 32818), (671, 30128), (854, 23672), (976, 20713), (1076, 18788), (1232, 16409), (1342, 15064), (1708, 11836), (1883, 10736), (2152, 9394), (2684, 7532), (2959, 6832), (3416, 5918), (3766, 5368), (4304, 4697)]