20981727

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{113}}^1$

素因数の和:181

約数の個数: 48

約数和(自身を含む): 35303520

約数和(自身を除く): 14321793

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 113, 117, 207, 299, 339, 351, 529, 621, 897, 1017, 1469, 1587, 2599, 2691, 3051, 4407, 4761, 6877, 7797, 8073, 13221, 14283, 20631, 23391, 33787, 39663, 59777, 61893, 70173, 101361, 179331, 185679, 304083, 537993, 777101, 912249, 1613979, 2331303, 6993909, 20981727]

約数ペア:

[(1, 20981727), (3, 6993909), (9, 2331303), (13, 1613979), (23, 912249), (27, 777101), (39, 537993), (69, 304083), (113, 185679), (117, 179331), (207, 101361), (299, 70173), (339, 61893), (351, 59777), (529, 39663), (621, 33787), (897, 23391), (1017, 20631), (1469, 14283), (1587, 13221), (2599, 8073), (2691, 7797), (3051, 6877), (4407, 4761)]