18895660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{971}}^1$

素因数の和:1126

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 26827220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 971, 973, 1390, 1942, 1946, 2780, 3884, 3892, 4855, 4865, 6797, 9710, 9730, 13594, 19420, 19460, 27188, 33985, 67970, 134969, 135940, 269938, 539876, 674845, 944783, 1349690, 1889566, 2699380, 3779132, 4723915, 9447830, 18895660]

約数ペア:

[(1, 18895660), (2, 9447830), (4, 4723915), (5, 3779132), (7, 2699380), (10, 1889566), (14, 1349690), (20, 944783), (28, 674845), (35, 539876), (70, 269938), (139, 135940), (140, 134969), (278, 67970), (556, 33985), (695, 27188), (971, 19460), (973, 19420), (1390, 13594), (1942, 9730), (1946, 9710), (2780, 6797), (3884, 4865), (3892, 4855)]