20921451

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{241}}^1\times {\mathrm{1523}}^1$

素因数の和:1786

約数の個数: 16

約数和(自身を含む): 29504640

約数和(自身を除く): 8583189

約数列:

[1, 3, 19, 57, 241, 723, 1523, 4569, 4579, 13737, 28937, 86811, 367043, 1101129, 6973817, 20921451]

約数ペア:

[(1, 20921451), (3, 6973817), (19, 1101129), (57, 367043), (241, 86811), (723, 28937), (1523, 13737), (4569, 4579)]