18987903

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 32348160

約数和(自身を除く): 13360257

約数列:

[1, 3, 9, 11, 23, 31, 33, 69, 93, 99, 207, 253, 269, 279, 341, 713, 759, 807, 1023, 2139, 2277, 2421, 2959, 3069, 6187, 6417, 7843, 8339, 8877, 18561, 23529, 25017, 26631, 55683, 68057, 70587, 75051, 91729, 191797, 204171, 275187, 575391, 612513, 825561, 1726173, 2109767, 6329301, 18987903]

約数ペア:

[(1, 18987903), (3, 6329301), (9, 2109767), (11, 1726173), (23, 825561), (31, 612513), (33, 575391), (69, 275187), (93, 204171), (99, 191797), (207, 91729), (253, 75051), (269, 70587), (279, 68057), (341, 55683), (713, 26631), (759, 25017), (807, 23529), (1023, 18561), (2139, 8877), (2277, 8339), (2421, 7843), (2959, 6417), (3069, 6187)]