20780181351

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1\times {\mathrm{2081}}^1$

素因数の和:2472

約数の個数: 48

約数和(自身を含む): 31200818688

約数和(自身を除く): 10420637337

約数列:

[1, 3, 9, 37, 111, 157, 191, 333, 471, 573, 1413, 1719, 2081, 5809, 6243, 7067, 17427, 18729, 21201, 29987, 52281, 63603, 76997, 89961, 230991, 269883, 326717, 397471, 692973, 980151, 1109519, 1192413, 2940453, 3328557, 3577239, 9985671, 12088529, 14706427, 36265587, 44119281, 62402947, 108796761, 132357843, 187208841, 561626523, 2308909039, 6926727117, 20780181351]

約数ペア:

[(1, 20780181351), (3, 6926727117), (9, 2308909039), (37, 561626523), (111, 187208841), (157, 132357843), (191, 108796761), (333, 62402947), (471, 44119281), (573, 36265587), (1413, 14706427), (1719, 12088529), (2081, 9985671), (5809, 3577239), (6243, 3328557), (7067, 2940453), (17427, 1192413), (18729, 1109519), (21201, 980151), (29987, 692973), (52281, 397471), (63603, 326717), (76997, 269883), (89961, 230991)]