21289576

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:167

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 34697624

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 19, 22, 28, 34, 38, 44, 56, 68, 76, 77, 88, 107, 119, 133, 136, 152, 154, 187, 209, 214, 238, 266, 308, 323, 374, 418, 428, 476, 532, 616, 646, 748, 749, 836, 856, 952, 1064, 1177, 1292, 1309, 1463, 1496, 1498, 1672, 1819, 2033, 2261, 2354, 2584, 2618, 2926, 2996, 3553, 3638, 4066, 4522, 4708, 5236, 5852, 5992, 7106, 7276, 8132, 8239, 9044, 9416, 10472, 11704, 12733, 14212, 14231, 14552, 16264, 16478, 18088, 20009, 22363, 24871, 25466, 28424, 28462, 32956, 34561, 40018, 44726, 49742, 50932, 56924, 65912, 69122, 80036, 89452, 99484, 101864, 113848, 138244, 140063, 156541, 160072, 178904, 198968, 241927, 276488, 280126, 313082, 380171, 483854, 560252, 626164, 760342, 967708, 1120504, 1252328, 1520684, 1935416, 2661197, 3041368, 5322394, 10644788, 21289576]

約数ペア:

[(1, 21289576), (2, 10644788), (4, 5322394), (7, 3041368), (8, 2661197), (11, 1935416), (14, 1520684), (17, 1252328), (19, 1120504), (22, 967708), (28, 760342), (34, 626164), (38, 560252), (44, 483854), (56, 380171), (68, 313082), (76, 280126), (77, 276488), (88, 241927), (107, 198968), (119, 178904), (133, 160072), (136, 156541), (152, 140063), (154, 138244), (187, 113848), (209, 101864), (214, 99484), (238, 89452), (266, 80036), (308, 69122), (323, 65912), (374, 56924), (418, 50932), (428, 49742), (476, 44726), (532, 40018), (616, 34561), (646, 32956), (748, 28462), (749, 28424), (836, 25466), (856, 24871), (952, 22363), (1064, 20009), (1177, 18088), (1292, 16478), (1309, 16264), (1463, 14552), (1496, 14231), (1498, 14212), (1672, 12733), (1819, 11704), (2033, 10472), (2261, 9416), (2354, 9044), (2584, 8239), (2618, 8132), (2926, 7276), (2996, 7106), (3553, 5992), (3638, 5852), (4066, 5236), (4522, 4708)]