21252856

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^2$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 44176320

約数和(自身を除く): 22923464

約数列:

[1, 2, 4, 8, 17, 31, 34, 62, 68, 71, 124, 136, 142, 248, 284, 527, 568, 1054, 1207, 2108, 2201, 2414, 4216, 4402, 4828, 5041, 8804, 9656, 10082, 17608, 20164, 37417, 40328, 74834, 85697, 149668, 156271, 171394, 299336, 312542, 342788, 625084, 685576, 1250168, 2656607, 5313214, 10626428, 21252856]

約数ペア:

[(1, 21252856), (2, 10626428), (4, 5313214), (8, 2656607), (17, 1250168), (31, 685576), (34, 625084), (62, 342788), (68, 312542), (71, 299336), (124, 171394), (136, 156271), (142, 149668), (248, 85697), (284, 74834), (527, 40328), (568, 37417), (1054, 20164), (1207, 17608), (2108, 10082), (2201, 9656), (2414, 8804), (4216, 5041), (4402, 4828)]