21453508

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:304

約数の個数: 36

約数和(自身を含む): 40325040

約数和(自身を除く): 18871532

約数列:

[1, 2, 4, 19, 38, 76, 83, 166, 179, 332, 358, 361, 716, 722, 1444, 1577, 3154, 3401, 6308, 6802, 13604, 14857, 29714, 29963, 59428, 59926, 64619, 119852, 129238, 258476, 282283, 564566, 1129132, 5363377, 10726754, 21453508]

約数ペア:

[(1, 21453508), (2, 10726754), (4, 5363377), (19, 1129132), (38, 564566), (76, 282283), (83, 258476), (166, 129238), (179, 119852), (332, 64619), (358, 59926), (361, 59428), (716, 29963), (722, 29714), (1444, 14857), (1577, 13604), (3154, 6802), (3401, 6308)]