201270321

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{401}}^1$

素因数の和:702

約数の個数: 48

約数和(自身を含む): 345166848

約数和(自身を除く): 143896527

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 257, 279, 401, 651, 771, 1203, 1799, 1953, 2313, 2807, 3609, 5397, 7967, 8421, 12431, 16191, 23901, 25263, 37293, 55769, 71703, 87017, 103057, 111879, 167307, 261051, 309171, 501921, 721399, 783153, 927513, 2164197, 3194767, 6492591, 9584301, 22363369, 28752903, 67090107, 201270321]

約数ペア:

[(1, 201270321), (3, 67090107), (7, 28752903), (9, 22363369), (21, 9584301), (31, 6492591), (63, 3194767), (93, 2164197), (217, 927513), (257, 783153), (279, 721399), (401, 501921), (651, 309171), (771, 261051), (1203, 167307), (1799, 111879), (1953, 103057), (2313, 87017), (2807, 71703), (3609, 55769), (5397, 37293), (7967, 25263), (8421, 23901), (12431, 16191)]