20804980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{859}}^1$

素因数の和:1048

約数の個数: 48

約数和(自身を含む): 50279040

約数和(自身を除く): 29474060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 173, 346, 692, 859, 865, 1211, 1718, 1730, 2422, 3436, 3460, 4295, 4844, 6013, 6055, 8590, 12026, 12110, 17180, 24052, 24220, 30065, 60130, 120260, 148607, 297214, 594428, 743035, 1040249, 1486070, 2080498, 2972140, 4160996, 5201245, 10402490, 20804980]

約数ペア:

[(1, 20804980), (2, 10402490), (4, 5201245), (5, 4160996), (7, 2972140), (10, 2080498), (14, 1486070), (20, 1040249), (28, 743035), (35, 594428), (70, 297214), (140, 148607), (173, 120260), (346, 60130), (692, 30065), (859, 24220), (865, 24052), (1211, 17180), (1718, 12110), (1730, 12026), (2422, 8590), (3436, 6055), (3460, 6013), (4295, 4844)]