21581744

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{167}}^1\times {\mathrm{197}}^1$

素因数の和:413

約数の個数: 40

約数和(自身を含む): 43309728

約数和(自身を除く): 21727984

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 167, 197, 328, 334, 394, 656, 668, 788, 1336, 1576, 2672, 3152, 6847, 8077, 13694, 16154, 27388, 32308, 32899, 54776, 64616, 65798, 109552, 129232, 131596, 263192, 526384, 1348859, 2697718, 5395436, 10790872, 21581744]

約数ペア:

[(1, 21581744), (2, 10790872), (4, 5395436), (8, 2697718), (16, 1348859), (41, 526384), (82, 263192), (164, 131596), (167, 129232), (197, 109552), (328, 65798), (334, 64616), (394, 54776), (656, 32899), (668, 32308), (788, 27388), (1336, 16154), (1576, 13694), (2672, 8077), (3152, 6847)]