20312985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 41564160

約数和(自身を除く): 21251175

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 43, 55, 77, 105, 129, 165, 215, 231, 301, 385, 409, 473, 645, 903, 1155, 1227, 1419, 1505, 2045, 2365, 2863, 3311, 4499, 4515, 6135, 7095, 8589, 9933, 13497, 14315, 16555, 17587, 22495, 31493, 42945, 49665, 52761, 67485, 87935, 94479, 123109, 157465, 193457, 263805, 369327, 472395, 580371, 615545, 967285, 1354199, 1846635, 2901855, 4062597, 6770995, 20312985]

約数ペア:

[(1, 20312985), (3, 6770995), (5, 4062597), (7, 2901855), (11, 1846635), (15, 1354199), (21, 967285), (33, 615545), (35, 580371), (43, 472395), (55, 369327), (77, 263805), (105, 193457), (129, 157465), (165, 123109), (215, 94479), (231, 87935), (301, 67485), (385, 52761), (409, 49665), (473, 42945), (645, 31493), (903, 22495), (1155, 17587), (1227, 16555), (1419, 14315), (1505, 13497), (2045, 9933), (2365, 8589), (2863, 7095), (3311, 6135), (4499, 4515)]