21273505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 8337503

約数列:

[1, 5, 11, 23, 55, 67, 115, 251, 253, 335, 737, 1255, 1265, 1541, 2761, 3685, 5773, 7705, 13805, 16817, 16951, 28865, 63503, 84085, 84755, 184987, 317515, 386791, 924935, 1933955, 4254701, 21273505]

約数ペア:

[(1, 21273505), (5, 4254701), (11, 1933955), (23, 924935), (55, 386791), (67, 317515), (115, 184987), (251, 84755), (253, 84085), (335, 63503), (737, 28865), (1255, 16951), (1265, 16817), (1541, 13805), (2761, 7705), (3685, 5773)]