86649820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 186278400

約数和(自身を除く): 99628580

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 355, 439, 556, 695, 710, 878, 1390, 1420, 1756, 2195, 2780, 4390, 8780, 9869, 19738, 31169, 39476, 49345, 61021, 62338, 98690, 122042, 124676, 155845, 197380, 244084, 305105, 311690, 610210, 623380, 1220420, 4332491, 8664982, 17329964, 21662455, 43324910, 86649820]

約数ペア:

[(1, 86649820), (2, 43324910), (4, 21662455), (5, 17329964), (10, 8664982), (20, 4332491), (71, 1220420), (139, 623380), (142, 610210), (278, 311690), (284, 305105), (355, 244084), (439, 197380), (556, 155845), (695, 124676), (710, 122042), (878, 98690), (1390, 62338), (1420, 61021), (1756, 49345), (2195, 39476), (2780, 31169), (4390, 19738), (8780, 9869)]