18009789

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 28532736

約数和(自身を除く): 10522947

約数列:

[1, 3, 7, 21, 47, 71, 141, 213, 257, 329, 497, 771, 987, 1491, 1799, 3337, 5397, 10011, 12079, 18247, 23359, 36237, 54741, 70077, 84553, 127729, 253659, 383187, 857609, 2572827, 6003263, 18009789]

約数ペア:

[(1, 18009789), (3, 6003263), (7, 2572827), (21, 857609), (47, 383187), (71, 253659), (141, 127729), (213, 84553), (257, 70077), (329, 54741), (497, 36237), (771, 23359), (987, 18247), (1491, 12079), (1799, 10011), (3337, 5397)]