19858839

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1$

素因数の和:440

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 17880681

約数列:

[1, 3, 7, 11, 13, 17, 21, 33, 39, 51, 77, 91, 119, 143, 187, 221, 231, 273, 357, 389, 429, 561, 663, 1001, 1167, 1309, 1547, 2431, 2723, 3003, 3927, 4279, 4641, 5057, 6613, 7293, 8169, 12837, 15171, 17017, 19839, 29953, 35399, 46291, 51051, 55627, 72743, 85969, 89859, 106197, 138873, 166881, 218229, 257907, 389389, 509201, 601783, 945659, 1168167, 1527603, 1805349, 2836977, 6619613, 19858839]

約数ペア:

[(1, 19858839), (3, 6619613), (7, 2836977), (11, 1805349), (13, 1527603), (17, 1168167), (21, 945659), (33, 601783), (39, 509201), (51, 389389), (77, 257907), (91, 218229), (119, 166881), (143, 138873), (187, 106197), (221, 89859), (231, 85969), (273, 72743), (357, 55627), (389, 51051), (429, 46291), (561, 35399), (663, 29953), (1001, 19839), (1167, 17017), (1309, 15171), (1547, 12837), (2431, 8169), (2723, 7293), (3003, 6613), (3927, 5057), (4279, 4641)]