208405720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{306479}}^1$

素因数の和:306507

約数の個数: 32

約数和(自身を含む): 496497600

約数和(自身を除く): 288091880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 306479, 612958, 1225916, 1532395, 2451832, 3064790, 5210143, 6129580, 10420286, 12259160, 20840572, 26050715, 41681144, 52101430, 104202860, 208405720]

約数ペア:

[(1, 208405720), (2, 104202860), (4, 52101430), (5, 41681144), (8, 26050715), (10, 20840572), (17, 12259160), (20, 10420286), (34, 6129580), (40, 5210143), (68, 3064790), (85, 2451832), (136, 1532395), (170, 1225916), (340, 612958), (680, 306479)]