20801480

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10613}}^1$

素因数の和:10638

約数の個数: 48

約数和(自身を含む): 54449820

約数和(自身を除く): 33648340

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10613, 21226, 42452, 53065, 74291, 84904, 106130, 148582, 212260, 297164, 371455, 424520, 520037, 594328, 742910, 1040074, 1485820, 2080148, 2600185, 2971640, 4160296, 5200370, 10400740, 20801480]

約数ペア:

[(1, 20801480), (2, 10400740), (4, 5200370), (5, 4160296), (7, 2971640), (8, 2600185), (10, 2080148), (14, 1485820), (20, 1040074), (28, 742910), (35, 594328), (40, 520037), (49, 424520), (56, 371455), (70, 297164), (98, 212260), (140, 148582), (196, 106130), (245, 84904), (280, 74291), (392, 53065), (490, 42452), (980, 21226), (1960, 10613)]