21557913

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:701

約数の個数: 32

約数和(自身を含む): 33331200

約数和(自身を除く): 11773287

約数列:

[1, 3, 13, 19, 39, 47, 57, 141, 247, 611, 619, 741, 893, 1833, 1857, 2679, 8047, 11609, 11761, 24141, 29093, 34827, 35283, 87279, 152893, 378209, 458679, 552767, 1134627, 1658301, 7185971, 21557913]

約数ペア:

[(1, 21557913), (3, 7185971), (13, 1658301), (19, 1134627), (39, 552767), (47, 458679), (57, 378209), (141, 152893), (247, 87279), (611, 35283), (619, 34827), (741, 29093), (893, 24141), (1833, 11761), (1857, 11609), (2679, 8047)]