20178704

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{13859}}^1$

素因数の和:13887

約数の個数: 40

約数和(自身を含む): 48121920

約数和(自身を除く): 27943216

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 104, 112, 182, 208, 364, 728, 1456, 13859, 27718, 55436, 97013, 110872, 180167, 194026, 221744, 360334, 388052, 720668, 776104, 1261169, 1441336, 1552208, 2522338, 2882672, 5044676, 10089352, 20178704]

約数ペア:

[(1, 20178704), (2, 10089352), (4, 5044676), (7, 2882672), (8, 2522338), (13, 1552208), (14, 1441336), (16, 1261169), (26, 776104), (28, 720668), (52, 388052), (56, 360334), (91, 221744), (104, 194026), (112, 180167), (182, 110872), (208, 97013), (364, 55436), (728, 27718), (1456, 13859)]