39997720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{20407}}^1$

素因数の和:20432

約数の個数: 48

約数和(自身を含む): 104693040

約数和(自身を除く): 64695320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 20407, 40814, 81628, 102035, 142849, 163256, 204070, 285698, 408140, 571396, 714245, 816280, 999943, 1142792, 1428490, 1999886, 2856980, 3999772, 4999715, 5713960, 7999544, 9999430, 19998860, 39997720]

約数ペア:

[(1, 39997720), (2, 19998860), (4, 9999430), (5, 7999544), (7, 5713960), (8, 4999715), (10, 3999772), (14, 2856980), (20, 1999886), (28, 1428490), (35, 1142792), (40, 999943), (49, 816280), (56, 714245), (70, 571396), (98, 408140), (140, 285698), (196, 204070), (245, 163256), (280, 142849), (392, 102035), (490, 81628), (980, 40814), (1960, 20407)]