21399015

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{2447}}^1$

素因数の和:2519

約数の個数: 32

約数和(自身を含む): 38071296

約数和(自身を除く): 16672281

約数列:

[1, 3, 5, 11, 15, 33, 53, 55, 159, 165, 265, 583, 795, 1749, 2447, 2915, 7341, 8745, 12235, 26917, 36705, 80751, 129691, 134585, 389073, 403755, 648455, 1426601, 1945365, 4279803, 7133005, 21399015]

約数ペア:

[(1, 21399015), (3, 7133005), (5, 4279803), (11, 1945365), (15, 1426601), (33, 648455), (53, 403755), (55, 389073), (159, 134585), (165, 129691), (265, 80751), (583, 36705), (795, 26917), (1749, 12235), (2447, 8745), (2915, 7341)]