20388080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8221}}^1$

素因数の和:8265

約数の個数: 40

約数和(自身を含む): 48937344

約数和(自身を除く): 28549264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8221, 16442, 32884, 41105, 65768, 82210, 131536, 164420, 254851, 328840, 509702, 657680, 1019404, 1274255, 2038808, 2548510, 4077616, 5097020, 10194040, 20388080]

約数ペア:

[(1, 20388080), (2, 10194040), (4, 5097020), (5, 4077616), (8, 2548510), (10, 2038808), (16, 1274255), (20, 1019404), (31, 657680), (40, 509702), (62, 328840), (80, 254851), (124, 164420), (155, 131536), (248, 82210), (310, 65768), (496, 41105), (620, 32884), (1240, 16442), (2480, 8221)]