21039015

素因数分解:

$3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{3533}}^1$

素因数の和:3938

約数の個数: 16

約数和(自身を含む): 33756768

約数和(自身を除く): 12717753

約数列:

[1, 3, 5, 15, 397, 1191, 1985, 3533, 5955, 10599, 17665, 52995, 1402601, 4207803, 7013005, 21039015]

約数ペア:

[(1, 21039015), (3, 7013005), (5, 4207803), (15, 1402601), (397, 52995), (1191, 17665), (1985, 10599), (3533, 5955)]