647145

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 1142856

約数和(自身を除く): 495711

約数列:

[1, 3, 5, 9, 15, 45, 73, 197, 219, 365, 591, 657, 985, 1095, 1773, 2955, 3285, 8865, 14381, 43143, 71905, 129429, 215715, 647145]

約数ペア:

[(1, 647145), (3, 215715), (5, 129429), (9, 71905), (15, 43143), (45, 14381), (73, 8865), (197, 3285), (219, 2955), (365, 1773), (591, 1095), (657, 985)]