278331837

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{12781}}^1$

素因数の和:12869

約数の個数: 32

約数和(自身を含む): 456470784

約数和(自身を除く): 178138947

約数列:

[1, 3, 7, 17, 21, 51, 61, 119, 183, 357, 427, 1037, 1281, 3111, 7259, 12781, 21777, 38343, 89467, 217277, 268401, 651831, 779641, 1520939, 2338923, 4562817, 5457487, 13253897, 16372461, 39761691, 92777279, 278331837]

約数ペア:

[(1, 278331837), (3, 92777279), (7, 39761691), (17, 16372461), (21, 13253897), (51, 5457487), (61, 4562817), (119, 2338923), (183, 1520939), (357, 779641), (427, 651831), (1037, 268401), (1281, 217277), (3111, 89467), (7259, 38343), (12781, 21777)]