21249208

素因数分解:

$2^3\times {\mathrm{97}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 40748400

約数和(自身を除く): 19499192

約数列:

[1, 2, 4, 8, 97, 139, 194, 197, 278, 388, 394, 556, 776, 788, 1112, 1576, 13483, 19109, 26966, 27383, 38218, 53932, 54766, 76436, 107864, 109532, 152872, 219064, 2656151, 5312302, 10624604, 21249208]

約数ペア:

[(1, 21249208), (2, 10624604), (4, 5312302), (8, 2656151), (97, 219064), (139, 152872), (194, 109532), (197, 107864), (278, 76436), (388, 54766), (394, 53932), (556, 38218), (776, 27383), (788, 26966), (1112, 19109), (1576, 13483)]