19978608

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{317}}^1$

素因数の和:442

約数の個数: 80

約数和(自身を含む): 56308896

約数和(自身を除く): 36330288

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 101, 104, 156, 202, 208, 303, 312, 317, 404, 606, 624, 634, 808, 951, 1212, 1268, 1313, 1616, 1902, 2424, 2536, 2626, 3804, 3939, 4121, 4848, 5072, 5252, 7608, 7878, 8242, 10504, 12363, 15216, 15756, 16484, 21008, 24726, 31512, 32017, 32968, 49452, 63024, 64034, 65936, 96051, 98904, 128068, 192102, 197808, 256136, 384204, 416221, 512272, 768408, 832442, 1248663, 1536816, 1664884, 2497326, 3329768, 4994652, 6659536, 9989304, 19978608]

約数ペア:

[(1, 19978608), (2, 9989304), (3, 6659536), (4, 4994652), (6, 3329768), (8, 2497326), (12, 1664884), (13, 1536816), (16, 1248663), (24, 832442), (26, 768408), (39, 512272), (48, 416221), (52, 384204), (78, 256136), (101, 197808), (104, 192102), (156, 128068), (202, 98904), (208, 96051), (303, 65936), (312, 64034), (317, 63024), (404, 49452), (606, 32968), (624, 32017), (634, 31512), (808, 24726), (951, 21008), (1212, 16484), (1268, 15756), (1313, 15216), (1616, 12363), (1902, 10504), (2424, 8242), (2536, 7878), (2626, 7608), (3804, 5252), (3939, 5072), (4121, 4848)]