21210123

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 32078592

約数和(自身を除く): 10868469

約数列:

[1, 3, 11, 33, 53, 67, 159, 181, 201, 543, 583, 737, 1749, 1991, 2211, 3551, 5973, 9593, 10653, 12127, 28779, 36381, 39061, 105523, 117183, 133397, 316569, 400191, 642731, 1928193, 7070041, 21210123]

約数ペア:

[(1, 21210123), (3, 7070041), (11, 1928193), (33, 642731), (53, 400191), (67, 316569), (159, 133397), (181, 117183), (201, 105523), (543, 39061), (583, 36381), (737, 28779), (1749, 12127), (1991, 10653), (2211, 9593), (3551, 5973)]