18788140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2003}}^1$

素因数の和:2086

約数の個数: 48

約数和(自身を含む): 45787392

約数和(自身を除く): 26999252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2003, 2345, 4006, 4690, 8012, 9380, 10015, 14021, 20030, 28042, 40060, 56084, 70105, 134201, 140210, 268402, 280420, 536804, 671005, 939407, 1342010, 1878814, 2684020, 3757628, 4697035, 9394070, 18788140]

約数ペア:

[(1, 18788140), (2, 9394070), (4, 4697035), (5, 3757628), (7, 2684020), (10, 1878814), (14, 1342010), (20, 939407), (28, 671005), (35, 536804), (67, 280420), (70, 268402), (134, 140210), (140, 134201), (268, 70105), (335, 56084), (469, 40060), (670, 28042), (938, 20030), (1340, 14021), (1876, 10015), (2003, 9380), (2345, 8012), (4006, 4690)]