21581373

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 32569344

約数和(自身を除く): 10987971

約数列:

[1, 3, 11, 33, 61, 71, 151, 183, 213, 453, 671, 781, 1661, 2013, 2343, 4331, 4983, 9211, 10721, 12993, 27633, 32163, 47641, 101321, 117931, 142923, 303963, 353793, 653981, 1961943, 7193791, 21581373]

約数ペア:

[(1, 21581373), (3, 7193791), (11, 1961943), (33, 653981), (61, 353793), (71, 303963), (151, 142923), (183, 117931), (213, 101321), (453, 47641), (671, 32163), (781, 27633), (1661, 12993), (2013, 10721), (2343, 9211), (4331, 4983)]