18431955

素因数分解:

$3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:729

約数の個数: 40

約数和(自身を含む): 33558624

約数和(自身を除く): 15126669

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 355, 405, 639, 641, 1065, 1917, 1923, 3195, 3205, 5751, 5769, 9585, 9615, 17307, 28755, 28845, 45511, 51921, 86535, 136533, 227555, 259605, 409599, 682665, 1228797, 2047995, 3686391, 6143985, 18431955]

約数ペア:

[(1, 18431955), (3, 6143985), (5, 3686391), (9, 2047995), (15, 1228797), (27, 682665), (45, 409599), (71, 259605), (81, 227555), (135, 136533), (213, 86535), (355, 51921), (405, 45511), (639, 28845), (641, 28755), (1065, 17307), (1917, 9615), (1923, 9585), (3195, 5769), (3205, 5751)]