20473915

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 31912704

約数和(自身を除く): 11438789

約数列:

[1, 5, 7, 11, 35, 49, 55, 71, 77, 107, 245, 355, 385, 497, 535, 539, 749, 781, 1177, 2485, 2695, 3479, 3745, 3905, 5243, 5467, 5885, 7597, 8239, 17395, 26215, 27335, 37985, 38269, 41195, 53179, 57673, 83567, 191345, 265895, 288365, 372253, 417835, 584969, 1861265, 2924845, 4094783, 20473915]

約数ペア:

[(1, 20473915), (5, 4094783), (7, 2924845), (11, 1861265), (35, 584969), (49, 417835), (55, 372253), (71, 288365), (77, 265895), (107, 191345), (245, 83567), (355, 57673), (385, 53179), (497, 41195), (535, 38269), (539, 37985), (749, 27335), (781, 26215), (1177, 17395), (2485, 8239), (2695, 7597), (3479, 5885), (3745, 5467), (3905, 5243)]