20007148

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 42706944

約数和(自身を除く): 22699796

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 47, 92, 94, 161, 188, 322, 329, 644, 658, 661, 1081, 1316, 1322, 2162, 2644, 4324, 4627, 7567, 9254, 15134, 15203, 18508, 30268, 30406, 31067, 60812, 62134, 106421, 124268, 212842, 217469, 425684, 434938, 714541, 869876, 1429082, 2858164, 5001787, 10003574, 20007148]

約数ペア:

[(1, 20007148), (2, 10003574), (4, 5001787), (7, 2858164), (14, 1429082), (23, 869876), (28, 714541), (46, 434938), (47, 425684), (92, 217469), (94, 212842), (161, 124268), (188, 106421), (322, 62134), (329, 60812), (644, 31067), (658, 30406), (661, 30268), (1081, 18508), (1316, 15203), (1322, 15134), (2162, 9254), (2644, 7567), (4324, 4627)]