20643272

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 45427200

約数和(自身を除く): 24783928

約数列:

[1, 2, 4, 8, 13, 19, 26, 31, 38, 52, 62, 76, 104, 124, 152, 247, 248, 337, 403, 494, 589, 674, 806, 988, 1178, 1348, 1612, 1976, 2356, 2696, 3224, 4381, 4712, 6403, 7657, 8762, 10447, 12806, 15314, 17524, 20894, 25612, 30628, 35048, 41788, 51224, 61256, 83239, 83576, 135811, 166478, 198493, 271622, 332956, 396986, 543244, 665912, 793972, 1086488, 1587944, 2580409, 5160818, 10321636, 20643272]

約数ペア:

[(1, 20643272), (2, 10321636), (4, 5160818), (8, 2580409), (13, 1587944), (19, 1086488), (26, 793972), (31, 665912), (38, 543244), (52, 396986), (62, 332956), (76, 271622), (104, 198493), (124, 166478), (152, 135811), (247, 83576), (248, 83239), (337, 61256), (403, 51224), (494, 41788), (589, 35048), (674, 30628), (806, 25612), (988, 20894), (1178, 17524), (1348, 15314), (1612, 12806), (1976, 10447), (2356, 8762), (2696, 7657), (3224, 6403), (4381, 4712)]