19987641

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:235

約数の個数: 40

約数和(自身を含む): 31595520

約数和(自身を除く): 11607879

約数列:

[1, 3, 9, 27, 29, 67, 81, 87, 127, 201, 261, 381, 603, 783, 1143, 1809, 1943, 2349, 3429, 3683, 5427, 5829, 8509, 10287, 11049, 17487, 25527, 33147, 52461, 76581, 99441, 157383, 229743, 246761, 298323, 689229, 740283, 2220849, 6662547, 19987641]

約数ペア:

[(1, 19987641), (3, 6662547), (9, 2220849), (27, 740283), (29, 689229), (67, 298323), (81, 246761), (87, 229743), (127, 157383), (201, 99441), (261, 76581), (381, 52461), (603, 33147), (783, 25527), (1143, 17487), (1809, 11049), (1943, 10287), (2349, 8509), (3429, 5829), (3683, 5427)]