257720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{379}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 615600

約数和(自身を除く): 357880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 379, 680, 758, 1516, 1895, 3032, 3790, 6443, 7580, 12886, 15160, 25772, 32215, 51544, 64430, 128860, 257720]

約数ペア:

[(1, 257720), (2, 128860), (4, 64430), (5, 51544), (8, 32215), (10, 25772), (17, 15160), (20, 12886), (34, 7580), (40, 6443), (68, 3790), (85, 3032), (136, 1895), (170, 1516), (340, 758), (379, 680)]