21906747

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{283}}^1$

素因数の和:400

約数の個数: 32

約数和(自身を含む): 33807360

約数和(自身を除く): 11900613

約数列:

[1, 3, 9, 27, 47, 61, 141, 183, 283, 423, 549, 849, 1269, 1647, 2547, 2867, 7641, 8601, 13301, 17263, 25803, 39903, 51789, 77409, 119709, 155367, 359127, 466101, 811361, 2434083, 7302249, 21906747]

約数ペア:

[(1, 21906747), (3, 7302249), (9, 2434083), (27, 811361), (47, 466101), (61, 359127), (141, 155367), (183, 119709), (283, 77409), (423, 51789), (549, 39903), (849, 25803), (1269, 17263), (1647, 13301), (2547, 8601), (2867, 7641)]