20831968

素因数分解:

$2^5\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 42620256

約数和(自身を除く): 21788288

約数列:

[1, 2, 4, 8, 16, 32, 53, 71, 106, 142, 173, 212, 284, 346, 424, 568, 692, 848, 1136, 1384, 1696, 2272, 2768, 3763, 5536, 7526, 9169, 12283, 15052, 18338, 24566, 30104, 36676, 49132, 60208, 73352, 98264, 120416, 146704, 196528, 293408, 393056, 650999, 1301998, 2603996, 5207992, 10415984, 20831968]

約数ペア:

[(1, 20831968), (2, 10415984), (4, 5207992), (8, 2603996), (16, 1301998), (32, 650999), (53, 393056), (71, 293408), (106, 196528), (142, 146704), (173, 120416), (212, 98264), (284, 73352), (346, 60208), (424, 49132), (568, 36676), (692, 30104), (848, 24566), (1136, 18338), (1384, 15052), (1696, 12283), (2272, 9169), (2768, 7526), (3763, 5536)]