21005348

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{193}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 47714688

約数和(自身を除く): 26709340

約数列:

[1, 2, 4, 7, 13, 14, 23, 26, 28, 46, 52, 91, 92, 161, 169, 182, 193, 299, 322, 338, 364, 386, 598, 644, 676, 772, 1183, 1196, 1351, 2093, 2366, 2509, 2702, 3887, 4186, 4439, 4732, 5018, 5404, 7774, 8372, 8878, 10036, 15548, 17563, 17756, 27209, 31073, 32617, 35126, 54418, 57707, 62146, 65234, 70252, 108836, 115414, 124292, 130468, 228319, 230828, 403949, 456638, 750191, 807898, 913276, 1500382, 1615796, 3000764, 5251337, 10502674, 21005348]

約数ペア:

[(1, 21005348), (2, 10502674), (4, 5251337), (7, 3000764), (13, 1615796), (14, 1500382), (23, 913276), (26, 807898), (28, 750191), (46, 456638), (52, 403949), (91, 230828), (92, 228319), (161, 130468), (169, 124292), (182, 115414), (193, 108836), (299, 70252), (322, 65234), (338, 62146), (364, 57707), (386, 54418), (598, 35126), (644, 32617), (676, 31073), (772, 27209), (1183, 17756), (1196, 17563), (1351, 15548), (2093, 10036), (2366, 8878), (2509, 8372), (2702, 7774), (3887, 5404), (4186, 5018), (4439, 4732)]