21951765

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{727}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 42247296

約数和(自身を除く): 20295531

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 61, 99, 165, 183, 305, 495, 549, 671, 727, 915, 2013, 2181, 2745, 3355, 3635, 6039, 6543, 7997, 10065, 10905, 23991, 30195, 32715, 39985, 44347, 71973, 119955, 133041, 221735, 359865, 399123, 487817, 665205, 1463451, 1995615, 2439085, 4390353, 7317255, 21951765]

約数ペア:

[(1, 21951765), (3, 7317255), (5, 4390353), (9, 2439085), (11, 1995615), (15, 1463451), (33, 665205), (45, 487817), (55, 399123), (61, 359865), (99, 221735), (165, 133041), (183, 119955), (305, 71973), (495, 44347), (549, 39985), (671, 32715), (727, 30195), (915, 23991), (2013, 10905), (2181, 10065), (2745, 7997), (3355, 6543), (3635, 6039)]