20779780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8731}}^1$

素因数の和:8764

約数の個数: 48

約数和(自身を含む): 52811136

約数和(自身を除く): 32031356

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 8731, 17462, 34924, 43655, 61117, 87310, 122234, 148427, 174620, 244468, 296854, 305585, 593708, 611170, 742135, 1038989, 1222340, 1484270, 2077978, 2968540, 4155956, 5194945, 10389890, 20779780]

約数ペア:

[(1, 20779780), (2, 10389890), (4, 5194945), (5, 4155956), (7, 2968540), (10, 2077978), (14, 1484270), (17, 1222340), (20, 1038989), (28, 742135), (34, 611170), (35, 593708), (68, 305585), (70, 296854), (85, 244468), (119, 174620), (140, 148427), (170, 122234), (238, 87310), (340, 61117), (476, 43655), (595, 34924), (1190, 17462), (2380, 8731)]