20877808

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9811}}^1$

素因数の和:9845

約数の個数: 40

約数和(自身を含む): 48667520

約数和(自身を除く): 27789712

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9811, 19622, 39244, 68677, 78488, 137354, 156976, 186409, 274708, 372818, 549416, 745636, 1098832, 1304863, 1491272, 2609726, 2982544, 5219452, 10438904, 20877808]

約数ペア:

[(1, 20877808), (2, 10438904), (4, 5219452), (7, 2982544), (8, 2609726), (14, 1491272), (16, 1304863), (19, 1098832), (28, 745636), (38, 549416), (56, 372818), (76, 274708), (112, 186409), (133, 156976), (152, 137354), (266, 78488), (304, 68677), (532, 39244), (1064, 19622), (2128, 9811)]