257759970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{660923}}^1$

素因数の和:660946

約数の個数: 32

約数和(自身を含む): 666211392

約数和(自身を除く): 408451422

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 660923, 1321846, 1982769, 3304615, 3965538, 6609230, 8591999, 9913845, 17183998, 19827690, 25775997, 42959995, 51551994, 85919990, 128879985, 257759970]

約数ペア:

[(1, 257759970), (2, 128879985), (3, 85919990), (5, 51551994), (6, 42959995), (10, 25775997), (13, 19827690), (15, 17183998), (26, 9913845), (30, 8591999), (39, 6609230), (65, 3965538), (78, 3304615), (130, 1982769), (195, 1321846), (390, 660923)]