21450639

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1453}}^1$

素因数の和:1519

約数の個数: 32

約数和(自身を含む): 35361280

約数和(自身を除く): 13910641

約数列:

[1, 3, 7, 19, 21, 37, 57, 111, 133, 259, 399, 703, 777, 1453, 2109, 4359, 4921, 10171, 14763, 27607, 30513, 53761, 82821, 161283, 193249, 376327, 579747, 1021459, 1128981, 3064377, 7150213, 21450639]

約数ペア:

[(1, 21450639), (3, 7150213), (7, 3064377), (19, 1128981), (21, 1021459), (37, 579747), (57, 376327), (111, 193249), (133, 161283), (259, 82821), (399, 53761), (703, 30513), (777, 27607), (1453, 14763), (2109, 10171), (4359, 4921)]