20287904

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{6967}}^1$

素因数の和:6997

約数の個数: 48

約数和(自身を含む): 49166208

約数和(自身を除く): 28878304

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 6967, 13934, 27868, 48769, 55736, 90571, 97538, 111472, 181142, 195076, 222944, 362284, 390152, 633997, 724568, 780304, 1267994, 1449136, 1560608, 2535988, 2898272, 5071976, 10143952, 20287904]

約数ペア:

[(1, 20287904), (2, 10143952), (4, 5071976), (7, 2898272), (8, 2535988), (13, 1560608), (14, 1449136), (16, 1267994), (26, 780304), (28, 724568), (32, 633997), (52, 390152), (56, 362284), (91, 222944), (104, 195076), (112, 181142), (182, 111472), (208, 97538), (224, 90571), (364, 55736), (416, 48769), (728, 27868), (1456, 13934), (2912, 6967)]